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BRCA Genetic Testing and Receipt of Preventive Interventions Among Women Aged 18–64 Years with Employer-Sponsored Health Insurance in Nonmetropolitan and Metropolitan Areas — United States, 2009–2014

Surveillance Summaries / September 8, 2017 / 66(15);1–11


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Katherine Kolor, PhD1; Zhuo Chen, PhD1,2,3; Scott D. Grosse, PhD4; Juan L. Rodriguez, MPH, MS5; Ridgely Fisk Green, PhD1,6; W. David Dotson, PhD1; M. Scott Bowen, MPH1; Julie A. Lynch, PhD7; Muin J. Khoury, MD, PhD1 (View author affiliations)

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Abstract

Problem/Condition: Genetic testing for breast cancer 1 (BRCA1) and breast cancer 2 (BRCA2) gene mutations can identify women at increased risk for breast and ovarian cancer. These testing results can be used to select preventive interventions and guide treatment. Differences between nonmetropolitan and metropolitan populations in rates of BRCA testing and receipt of preventive interventions after testing have not previously been examined.

Period Covered: 2009–2014.

Description of System: Medical claims data from Truven Health Analytics MarketScan Commercial Claims and Encounters databases were used to estimate rates of BRCA testing and receipt of preventive interventions after BRCA testing among women aged 18–64 years with employer-sponsored health insurance in metropolitan and nonmetropolitan areas of the United States, both nationally and regionally.

Results: From 2009 to 2014, BRCA testing rates per 100,000 women aged 18–64 years with employer-sponsored health insurance increased 2.3 times (102.7 to 237.8) in metropolitan areas and 3.0 times (64.8 to 191.3) in nonmetropolitan areas. The relative difference in BRCA testing rates between metropolitan and nonmetropolitan areas decreased from 37% in 2009 (102.7 versus 64.8) to 20% in 2014 (237.8 versus 191.3). The relative difference in BRCA testing rates between metropolitan and nonmetropolitan areas decreased more over time in younger women than in older women and decreased in all regions except the West. Receipt of preventive services 90 days after BRCA testing in metropolitan versus nonmetropolitan areas throughout the period varied by service: the percentage of women who received a mastectomy was similar, the percentage of women who received magnetic resonance imaging of the breast was lower in nonmetropolitan areas (as low as 5.8% in 2014 to as high as 8.2% in 2011) than metropolitan areas (as low as 7.3% in 2014 to as high as 10.3% in 2011), and the percentage of women who received mammography was lower in nonmetropolitan areas in earlier years but was similar in later years.

Interpretation: Possible explanations for the 47% decrease in the relative difference in BRCA testing rates over the study period include increased access to genetic services in nonmetropolitan areas and increased demand nationally as a result of publicity. The relative differences in metropolitan and nonmetropolitan BRCA testing rates were smaller among women at younger ages compared with older ages.

Public Health Action: Improved data sources and surveillance tools are needed to gather comprehensive data on BRCA testing in the United States, monitor adherence to evidence-based guidelines for BRCA testing, and assess receipt of preventive interventions for women with BRCA mutations. Programs can build on the recent decrease in geographic disparities in receipt of BRCA testing while simultaneously educating the public and health care providers about U.S. Preventive Services Task Force recommendations and other clinical guidelines for BRCA testing and counseling.

Introduction

Genetic mutations in the breast cancer 1 (BRCA1) and breast cancer 2 (BRCA2) genes can increase breast cancer risk in women by age 70 years from 7% to an estimated 45%–65% and can increase ovarian cancer risk by age 70 years from 0.6% to 17%–39% (1,2). Genetic testing based on personal and family health history criteria can identify women with BRCA mutations who could benefit from preventive interventions that can decrease cancer risk. BRCA testing for women who have received these cancer diagnoses can be used to make surgical and drug treatment decisions (3,4).

Interventions for women with BRCA mutations for cancer prevention and earlier detection include enhanced screening (e.g., receiving mammograms at a younger age and more frequently than lower risk women along with magnetic resonance imaging [MRI]); risk-reducing medications such as tamoxifen or raloxifene; and prophylactic surgery to remove the breasts, ovaries, or both. Prophylactic mastectomy can reduce the risk for breast cancer by 85%–100%, and prophylactic oophorectomy can reduce the risk for ovarian cancer by 69%–100% and breast cancer by 37%–100% (1). For women who have breast cancer, prophylactic contralateral mastectomy might be offered as an option to reduce the risk for contralateral breast cancers (5). BRCA testing is approved by the Food and Drug Administration as a companion diagnostic tool to guide treatment with poly(ADP-ribose) polymerase (PARP) inhibitors among women with ovarian cancer who have already undergone multiple lines of chemotherapy (6,7). Phase III clinical trials have reported promising results for the PARP inhibitor olaparib as a treatment for breast cancer in women with BRCA mutations (8).

Several clinical guidelines are available to help specialty and primary care providers to determine whether BRCA genetic counseling and testing is appropriate for their patients. The 2013 U.S. Preventive Services Task Force (USPSTF) BRCA guideline recommends that primary care providers assess women for increased risk for BRCA mutations using family health history to identify women who might benefit from genetic counseling (1). The National Comprehensive Cancer Network (NCCN) guidelines specify family and personal history criteria that warrant additional genetic risk assessments (3). In addition, the USPSTF and NCCN guidelines review preventive interventions for women identified with BRCA mutations. When a BRCA mutation is identified, other family members can be tested for the known mutation (i.e., cascade testing) to identify others at increased risk for cancer (1,3). A Healthy People 2020 objective is to increase rates of genetic counseling for women with a family health history indicating an increased risk for breast or ovarian cancers (9). BRCA genetic counseling and testing are usually covered, in network without cost sharing, by most health insurance plans as preventive services when used in accordance with USPSTF recommendations (10).

BRCA testing guidelines generally recommend both pretest and posttest genetic counseling by a trained health care provider (1,11). As of 2016, approximately 5,000 genetic counselors were practicing in the United States (12). The geographic distribution of genetic service providers has historically been uneven, with a concentration in urban areas and academic medical centers. However, a 2016 survey of genetic counselors found that nearly half reported serving smaller, more rural populations (12). Alternative genetic services delivery models, such as telephone counseling (13), outreach clinic services (14), and telemedicine genetic services (15–17), are being incorporated by genetic counselors to complement in-person counseling and to help improve overall access to care (e.g., in rural areas). In addition, genetic services, such as BRCA genetic counseling and testing, are being offered by specialists who are not geneticists, including oncologists and obstetrician-gynecologists (18,19).

A comparison of changes over time in BRCA testing rates and receipt of preventive interventions after BRCA testing in urban and rural areas at the national and regional levels could help to document the evolution of differences in service use. However, the available data for monitoring BRCA testing in the U.S. population and its subgroups are limited. For example, claims data can be used to assess use of health services, and specific billing codes for BRCA testing have been available since 2001 (20). However, BRCA test billing codes have changed over time, and before 2013, nonspecific billing codes were also used for BRCA testing, which hinders complete ascertainment of these tests from claims data (21). Furthermore, numerous factors might influence variations in BRCA test use in the United States. For example, a substantial increase in BRCA testing occurred in 2013 after publication of a celebrity’s editorial describing her decision to receive a preventive double mastectomy after BRCA testing indicated that she carried a BRCA gene mutation (22,23). In addition, physicians reported conducting more testing after a direct-to-consumer advertising campaign that was intended to raise awareness about BRCA testing among women with a personal or family history of breast or ovarian cancer (24). Racial/ethnic disparities in rates of BRCA testing and follow-up preventive services have been reported (25), attributed in part to socioeconomic factors and physician referral patterns (26).

To examine differences over time and by census region in BRCA testing rates in nonmetropolitan and metropolitan areas in the United States, this report analyzes health claims data from the Truven Health Analytics MarketScan Commercial Claims and Encounters (CCAE) databases. This report presents rates of BRCA testing (for any reason other than testing for known Ashkenazi mutations) from 2009 to 2014 among women aged 18–64 years. In addition, this report describes receipt of preventive services (i.e., mammography, breast MRI, and mastectomy) and genetic counseling among women who had BRCA tests. These findings can be used by public health officials and practitioners to better understand differences in the implementation of genomic medicine applications in metropolitan and nonmetropolitan areas and identify areas of potential need and growth.

Methods

Medical claims data from 2009 to 2014 for women aged 18–64 years were extracted from Truven Health Analytics MarketScan CCAE databases (27), a proprietary data system integrating information from inpatient services, outpatient services (including laboratory tests), and outpatient pharmacies provided by a nationwide convenience sample of employers and employer-sponsored commercial insurance plans that cover employees and their dependents. The MarketScan CCAE databases contain enrollment data and longitudinally linked health care use and expenditure data. MarketScan claims and patient-level information, including age, sex, geographic location, diagnostic codes, and procedure codes, were analyzed. Both partial-year and full-year enrollees were included. Residential status (nonmetropolitan and metropolitan) of enrollees was mapped from the five-digit zip code of the primary beneficiary by Truven Health Analytics based on the Office of Management and Budget delineations for metropolitan statistical areas (MSAs) available through the U.S. census website (27). The residential status of women who changed their status (i.e., from nonmetropolitan to metropolitan or the reverse) was determined by where they lived the most months during that year.

Receipt of both preventive-associated and treatment-associated BRCA testing was ascertained from outpatient and inpatient claims. Claims of BRCA testing were extracted using Healthcare Common Procedure Coding System (HCPCS) codes (S3818–S3823) and Current Procedural Terminology (CPT) codes (81211–81217). Four subtypes of BRCA tests were defined based on billing codes: full-gene sequencing, known mutation tests, Ashkenazi panel, and large rearrangement tests (which are typically done at the same time as or after full-gene sequencing tests). Women who had BRCA panel tests for Ashkenazi mutations were excluded from the final analyses of BRCA testing rates to avoid inflating differences between metropolitan and nonmetropolitan areas because almost all Ashkenazi panel testing was concentrated in metropolitan areas. Women who had Ashkenazi panel testing accounted for approximately 5% of women who had any BRCA testing during the study period and ≤0.1% of all women aged 18–64 years. When calculating BRCA testing rates, women who had Ashkenazi panel tests were excluded from the numerator.  However, the data contain no measure of ethnicity that could be used to exclude women of Ashkenazi ancestry from the denominator.

The annual calendar-year receipt rates of any BRCA test and subtypes were calculated as follows: the number of women enrollees aged 18–64 years who had at least one claim in the calendar year that contained one of the BRCA testing procedure codes divided by the total number of women aged 18–64 years enrolled at any point during that year, multiplied by 100,000. For each study year, enrollee age was defined as the age on January 1, or at the start of enrollment period for partial-year enrollees. Rates also were calculated by age group (18–34, 35–44, 45–54, and 55–64 years) and by U.S. census region (Northeast, Midwest, South, and West) (28). Adjusting BRCA testing rates in metropolitan and nonmetropolitan areas by age and region using 2010 U.S. census data did not affect the general findings or conclusions. Therefore, only unadjusted BRCA testing rates are reported.

Receipt of preventive services within 90 days or 1 year after BRCA testing was examined for mastectomy (CPT codes 19303 and 19304, and International Classification of Diseases, Ninth Revision, Clinical Modification ([ICD-9-CM] procedure codes 85.33–85.36 and 85.41–85.44), breast MRI (CPT code 77059) and screening and diagnostic mammography (HCPCS codes G0202, G0204, and G0206 and CPT codes 77055, 77056, and 77057). The CPT code for MRI does not distinguish between screening and diagnostic indications. Both screening and diagnostic codes were used for mammography because certain physicians might bill for screening mammograms using diagnostic codes (29). Receipt of formal genetic counseling was examined within 90 days before testing and within 90 days after BRCA testing to ensure inclusion of pretest and posttest counseling (HCPCS code S0265 and CPT code 96040).

Chi-square tests were used for statistical comparisons, with no corrections for multiple comparisons. The relative difference in BRCA testing rates between metropolitan and nonmetropolitan areas was calculated as the difference between the metropolitan and nonmetropolitan rates as a proportion of the metropolitan rate. Differences for rates and relative differences were considered significant at p<0.05.

Results

MarketScan CCAE Sample Characteristics

From 2009 to 2014, the number of women aged 18–64 years included annually in the MarketScan CCAE databases ranged from as low as 15.5 million (in 2009) to as high as 20.6 million (in 2012) (Supplementary Table, https://stacks.cdc.gov/view/cdc/47271). The proportion of women living in nonmetropolitan areas decreased over time from 15.3% in 2009 to 12.9% in 2014. Women in the MarketScan CCAE databases were older in nonmetropolitan areas than in metropolitan areas (Supplementary Table, https://stacks.cdc.gov/view/cdc/47271).

From 2009 to 2014, a total of 164,837 unique enrollees aged 18–64 years were identified in the MarketScan sample as having had BRCA tests, with 166,069 person-years of testing (Table 1); 1,221 enrollees had BRCA testing in ≥2 years, including 11 with testing in >2 years. Of the 1,221 enrollees who had BRCA testing in multiple years, 1,123 (92.0%) lived in metropolitan areas, and 86 (7.0%) lived in nonmetropolitan areas. Twelve (<1.0%) changed residential status. A total of 10.4% of enrollees who had BRCA tests during the study period lived in nonmetropolitan areas (n = 17,112) (Table 1).

Annual BRCA Testing Rates from 2009 to 2014

From 2009 to 2014, BRCA testing rates per 100,000 women aged 18–64 years enrolled in employer-sponsored health insurance (MarketScan database) increased 2.3 times (102.7 to 237.8) in metropolitan areas and 3.0 times (64.8 to 191.3) in nonmetropolitan areas (Table 1, Figure 1). The relative difference in testing rates decreased by almost half (47%) from 36.9% in 2009 to 19.6% in 2014. BRCA testing rates were higher in metropolitan areas than in nonmetropolitan areas throughout the study period for women having any BRCA test and all BRCA test subtypes a (Figure 1). In 2014, the proportions of test subtypes were similar in metropolitan and nonmetropolitan areas, with 93.6% (metropolitan) and 94.3% (nonmetropolitan) of women having full-gene sequencing tests, 87.3% (metropolitan) and 87.5% (nonmetropolitan) of women having large rearrangement tests, and 4.4% (metropolitan) and 4.6% (nonmetropolitan) of women having known mutation tests (data not shown).

BRCA Testing Rates by Age Group

Women who had any BRCA test were significantly older on average in nonmetropolitan areas than in metropolitan areas (combined across the study period); however, the youngest women (18–34 years) were similarly represented at 14.7% and 14.9%, respectively (Table 1). For all age groups, BRCA testing rates were higher in metropolitan areas than in nonmetropolitan areas across the study period. Women aged 18–34 years had the highest relative increase in BRCA testing compared with older age groups both for metropolitan and nonmetropolitan areas. The relative difference in BRCA testing rates between metropolitan and nonmetropolitan areas decreased more from 2009 to 2014 in younger women than in older women, and the relative metropolitan-nonmetropolitan differences in BRCA testing rates were lower in younger age groups in 2014: 12.8% (18–34 years), 19.7% (35–44 years), 22.4% (45–54 years), and 25.9% (55–64 years).

BRCA Testing Rates by Region

In each of the four regions, BRCA testing rates among women aged 18–64 years increased over the study period both in metropolitan and nonmetropolitan areas (Table 1). BRCA testing rates were highest in the Northeast across the study period in both metropolitan and nonmetropolitan areas, except in 2014 when the nonmetropolitan rates in the Northeast and South were comparable. BRCA testing rates generally increased more in nonmetropolitan areas than metropolitan areas across the study period in all regions except the West. BRCA testing rates showed the greatest relative increase over the study period in the nonmetropolitan South (3.4 times), which accounted for 47% of the nonmetropolitan sample. In the most recent study years (2013–2014), the South had the smallest relative and absolute differences in metropolitan and nonmetropolitan BRCA testing rates among women aged 18–64 years (Table 1).

Receipt of Preventive Interventions and Genetic Counseling Among Women Who Received BRCA Testing

The percentage of women who received a mastectomy within 90 days or 1 year after BRCA testing peaked in 2011 (Table 2). Similar percentages were observed across the study period in metropolitan and nonmetropolitan areas (Table 2). Annual percentages within 90 days after BRCA testing ranged from 6.5%–9.6% in metropolitan areas and 5.7%–10.4% in nonmetropolitan areas (Table 2). Annual percentages of mammography within 90 days after BRCA testing ranged from 13.0%–14.0% in metropolitan areas and 11.5%–14.1% in nonmetropolitan areas (Table 2). The percentage of women who received a breast MRI within 90 days or 1 year after BRCA testing peaked in 2011 and was higher across the study period in metropolitan areas compared with nonmetropolitan areas, ranging from 11.3%–15.8% compared with 8.6%–12.8% in nonmetropolitan areas within 1 year; the difference was not statistically significant for 90-day follow-up in 2010 (Table 2). The percentage of women who received genetic counseling identified through billing codes within 90 days before BRCA testing and 90 days after testing was higher in metropolitan areas than in nonmetropolitan areas across the study period; from 2009 to 2014, genetic counseling increased from 5.3% to 8.0% in metropolitan areas and from 3.8% to 5.2% in nonmetropolitan areas (Table 2). When combining data across the study period, nonmetropolitan areas had significantly lower percentages of women who received an MRI within 90 days or 1 year after testing, genetic counseling within 90 days before and 90 days after testing, and mammography within 1 year after testing (Figure 2).

Discussion

From 2009 to 2014, BRCA testing rates among women aged 18–64 years with employer-sponsored health insurance were lower in nonmetropolitan areas than in metropolitan areas. However, BRCA testing rates increased more in nonmetropolitan areas than metropolitan areas. Although the absolute differences between metropolitan and nonmetropolitan rates increased over the study period, the relative differences decreased. The lower rates of BRCA testing reported in nonmetropolitan areas might reflect differences in access to specialty care providers, including cancer genetic service providers. The lower rate also might reflect general factors such as poverty, lower educational attainment, and lack of health insurance, which have previously been implicated in health care and preventive service access disparities in urban and rural areas (30). Although significant differences were found in the sample age distribution between metropolitan and nonmetropolitan areas, adjusting the BRCA testing rates by age did not change the general findings or conclusions.

BRCA mutations are found in all racial/ethnic groups; however, certain populations, notably Ashkenazi Jews, have both higher frequencies of specific BRCA mutations and are concentrated in metropolitan areas, which might therefore differentially affect metropolitan and nonmetropolitan BRCA testing rates. In this study, women who received BRCA testing for Ashkenazi mutations were excluded to minimize potential bias.

The decreased disparity in testing rates between metropolitan and nonmetropolitan areas from 2009 to 2014 could reflect a decreasing reliance on specialists for genetic testing for BRCA. In 2013, the USPSTF recommendation stated that trained health professionals, including primary care providers, could provide genetic counseling about BRCA mutation testing to identify women deemed to be at risk for BRCA mutations based on family history (1). Because small proportions of women who received genetic testing for BRCA had claims for genetic counseling throughout the period, both in metropolitan and nonmetropolitan areas, differences in access to genetic counseling services are unlikely to have been an important factor; however, genetic counseling billing codes might not include all instances of counseling services (31,32).

Finally, the coverage of BRCA counseling and testing under the Patient Protection and Affordable Care Act (ACA), when these services are provided in accordance with USPSTF guidelines, might have influenced BRCA testing rates both in urban and rural areas during the study period. Although the ACA provision that requires many health plans to promote in-network coverage without cost sharing for certain USPSTF-recommended services became effective in September 2010, a clarification issued in February 2013 might have increased testing, along with other factors discussed (22–24). This additional guidance specified that BRCA testing and counseling, if determined appropriate by a woman’s health care provider, is covered as a preventive service (10). A recent study showed that in the 2 years after the 2013 ACA clarification, the percentage of women with no out-of-pocket expenses increased (33).

The relative difference in testing rates between metropolitan and nonmetropolitan areas generally decreased over the study period across all age groups but decreased most among women aged 18–34 years and least among women aged 55–64 years. Women aged 18–34 years had the highest relative growth in BRCA testing compared with older age groups for both metropolitan and nonmetropolitan areas. Younger persons might adopt the use of newer health care services more quickly, and access to services might present less of a barrier for younger than for older age groups (34). The regional analyses demonstrated that national increases in BRCA testing can mask important differences in population subgroups. For example, in the West, BRCA testing increased more over the study period in metropolitan areas than in nonmetropolitan areas, unlike the other regions examined. This might indicate that the West has unique challenges in reaching nonmetropolitan areas with BRCA testing.

Among women with BRCA mutations, lower receipt of preventive services such as MRI in nonmetropolitan areas could reflect barriers to access, lower risk for having a BRCA mutation among those tested, or a higher proportion of BRCA testing performed based on family health history compared with personal history of cancer. The percentage of women who received a mastectomy or an MRI after BRCA testing peaked in 2011 both in metropolitan and nonmetropolitan areas; the decreasing percentages observed from 2012 to 2014 could reflect a shift over time toward a higher proportion of BRCA testing done based on family health history compared with personal history of cancer (35). The percentage of women who received a mastectomy was similar in metropolitan and nonmetropolitan regions within 90 days and 1 year after BRCA testing; however, a longer follow-up period might be needed to include prophylactic surgeries in women with BRCA mutations who were ascertained based on family health history rather than newly diagnosed breast cancer (36).

If BRCA testing rates in nonmetropolitan areas were the same as the rates observed in metropolitan areas, approximately 6,600 additional women (39% more) in this sample would have received BRCA testing in nonmetropolitan areas from 2009 to 2014. Conversely, if BRCA testing rates in metropolitan areas had been the same as the rates observed in nonmetropolitan areas, approximately 41,000 fewer women in this sample (28% fewer) would have received BRCA testing in metropolitan areas from 2009 to 2014. If the average metropolitan BRCA testing rates from the two regions with the highest rates of testing (Northeast and South) were applied to the two regions with the lowest rates of testing (Midwest and West), 21% more BRCA tests would be expected in metropolitan areas and 65% in nonmetropolitan areas.

The highest annual rate of BRCA testing reported in this study (332.5 women with any BRCA test per 100,000 women aged 44–54 years in 2014) is comparable to the upper-bound estimated prevalence of BRCA mutations in the general U.S. population of 200–333 per 100,000 (37). However, in Michigan during 2009–2013, <15% of women tested after counseling had a BRCA mutation identified (38), which is consistent with the predictive value of current risk assessment criteria (1). Improved collection of family health history information and assessment of this information using validated risk assessment tools could help improve the identification of women at increased risk for BRCA mutations who could benefit from genetic counseling, testing, and preventive interventions. Cascade testing of family members for mutations that have been identified previously in relatives can increase the potential impact of BRCA testing. However, few women who have BRCA testing are tested for known mutations (4%–5% in this study), which indicates that the frequency of cascade testing is low.

Limitations

The findings in this report are subject to at least five limitations. First, MarketScan CCAE databases include women who have employer-sponsored insurance but not those who are uninsured, have public insurance, or purchase insurance themselves. These data are not representative of the general U.S. population and might overestimate BRCA testing rates. Approximately 60% of working-age U.S. adults have employer-sponsored insurance; this percentage has not changed appreciably in recent years (39). In addition, the sample is not necessarily representative of the population with employer-sponsored insurance (40); the number of plans and enrollees in the MarketScan CCAE databases varied over the study period. Second, the MarketScan analysis does not include BRCA tests that were paid for by the patient or those ordered under CPT codes for laboratory methods and test reporting that are not specific to BRCA testing. Claims data also might be subject to recording errors or adjudication errors, and the reliability of the coding of BRCA tests might have changed over time. These factors might have affected the completeness of ascertainment of BRCA tests, particularly before 2013 (21,41). Third, the OMB metropolitan-nonmetropolitan classification scheme is an imperfect proxy for rural-urban classification for several reasons. For example, large metropolitan areas might contain rural areas that might be far from an urban center, which might reduce the overall rates of BRCA testing observed in metropolitan areas and present an incomplete assessment of BRCA testing in nonmetropolitan areas due to misclassification. In addition, residence in a metropolitan or nonmetropolitan area was determined by the primary beneficiary, who might have lived in a different area than the woman who received the test (e.g., young women who were on a parent health insurance plan but did not live with the parent and spouses who were on the same insurance plan but lived in different states). Residence in a metropolitan or nonmetropolitan area might have changed at the time of BRCA testing and might also have changed for multiyear enrollees. Among women who had BRCA testing, <1% had testing over multiple years, and <1% of those changed residential status. Fourth, the outcomes of BRCA tests and whether women met current BRCA testing guidelines could not be determined from medical claims data. Therefore, determining whether the lower levels of testing in nonmetropolitan areas represented proportionately lower use of appropriate testing compared to metropolitan areas was not possible. Finally, the billing codes used to identify genetic counseling services were expected to identify only a fraction of women who received genetic counseling because genetic counseling is often billed under evaluation and management codes when attended by a physician (31,32), and counseling might be provided by clinicians other than genetic counselors. Therefore, these findings underestimate receipt of genetic counseling services. Mammography and MRI percentages are likely overestimates because both screening and diagnostic indications are included (42).

Conclusion

Although BRCA testing rates were lower in nonmetropolitan areas, they increased proportionally more than in metropolitan areas. Regional and age differences in BRCA testing rates reveal specific population subgroups with greater metropolitan and nonmetropolitan differences. Administrative data used in this report can help public health officials monitor changes over time in the differences in BRCA testing rates and receipt of preventive services between metropolitan and nonmetropolitan populations to address differences in BRCA testing rates, specifically, and (possibly) genetic services, in general. However, administrative data cannot be used to assess compliance with recommendations for testing and preventive services. To monitor the extent to which BRCA testing rates and receipt of preventive interventions after BRCA testing adhere to evidence-based guidelines and result in actions likely to prevent death from certain cancers, improved surveillance tools are needed to determine the indications for and results of BRCA testing. CDC funds state health departments to promote the application of best practices for evidence-based breast cancer genomics through education, surveillance, and policy activities (43). The data sources, tools, and resources developed through these programs can be applied to further examine and address differences in rates of BRCA testing and receipt of follow-up preventive services across population subgroups, including metropolitan and nonmetropolitan differences. Programs can build on the recent decrease in geographic disparities in receipt of BRCA testing while simultaneously educating the public and health care providers about U.S. Preventive Services Task Force recommendations and other clinical guidelines for BRCA testing and counseling.

Acknowledgments

Robin M. Wagner, PhD, Office of Public Health Scientific Services, Guest Editor, Paul Z. Siegel, MD, Office of Public Health Scientific Services, CDC, Atlanta, Georgia.

Corresponding author: Katherine Kolor, Office of Public Health Genomics, Division of Public Health Information Dissemination, Center for Surveillance, Epidemiology, and Laboratory Services, CDC. Telephone: 404-498-0001; E-mail: bqx7@cdc.gov.

1Office of Public Health Genomics, Division of Public Health Information Dissemination, Center for Surveillance, Epidemiology, and Laboratory Services, CDC, Atlanta, Georgia; 2CFO Leasing, Inc., Atlanta, Georgia; 3Department of Health Policy and Management, College of Public Health, University of Georgia, Athens, Georgia ; 4National Center on Birth Defects and Developmental Disabilities, CDC, Atlanta, Georgia; 5Division of Cancer Prevention and Control, National Center for Chronic Disease Prevention and Health Promotion, CDC, Atlanta, Georgia; 6Carter Consulting, Inc., Atlanta, Georgia; 7US Department of Veterans Affairs Salt Lake City Healthcare System, Salt Lake City, Utah

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Return to your place in the textTABLE 1. Number and rate* of BRCA testing among women aged 18–64 years† who were enrolled in employer-sponsored health insurance, in metropolitan and nonmetropolitan areas — United States, 2009–2014
Age group and region 2009 2010 2011 2012 2013 2014 Total§
Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Total
No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate) No. (Rate)
Total 13,475 (102.7) 1,533 (64.8) 16,826 (113.2) 1,977 (77.3) 21,558 (125.2) 2,576 (88.8) 25,256 (143.4) 2,945 (100.1) 33,193 (222.6) 3,560 (160.4) 38,560 (237.8) 4,610 (191.3) 147,725 (380.3) 17,112 (255.2) 164,837 (361.9)
Age group (yrs)
18–34 1,788 (41.2) 173 (24.3) 2,106 (43.0) 255 (33.7) 3,002 (51.4) 347 (39.0) 3,875 (63.3) 424 (45.0) 5,010 (96.4) 579 (81.5) 6,328 (110.8) 742 (96.6) 22,030 (142.1) 2,511 (103.4) 24,541 (136.1)
35–44 4,059 (137.9) 425 (85.8) 4,929 (147.9) 562 (104.4) 6,175 (166.0) 645 (110.5) 7,275 (193.3) 782 (134.3) 9,384 (297.4) 923 (211.5) 10,818 (318.7) 1,205 (255.8) 42,335 (515.9) 4,519 (337.0) 46,854 (490.8)
45–54 4,918 (151.1) 572 (92.2) 6,251 (168.8) 740 (109.7) 7,696 (184.8) 951 (129.1) 8,736 (209.1) 1,048 (144.1) 11,256 (322.9) 1,229 (228.7) 12,377 (332.5) 1,487 (258.1) 50,794 (597.1) 5,999 (380.6) 56,793 (563.3)
55–64 2,710 (105.2) 363 (67.3) 3,540 (120.9) 420 (71.7) 4,685 (134.3) 633 (91.5) 5,370 (151.3) 691 (99.9) 7,543 (245.9) 829 (154.9) 9,037 (267.0) 1,176 (197.8) 32,566 (491.0) 4,083 (300.1) 36,649 (458.5)
Region**
Northeast 2,668 (148.6) 89 (83.0) 3,695 (153.7) 227 (104.6) 5,021 (153.0) 482 (120.8) 5,678 (166.9) 471 (117.3) 8,843 (291.3) 471 (195.5) 9,747 (263.6) 750 (206.0) 35,317 (487.8) 2,468 (326.9) 37,785 (472.6)
South 6,114 (101.4) 738 (62.7) 6,373 (112.1) 967 (73.8) 7,205 (119.5) 1,072 (78.4) 8,696 (142.2) 1,278 (96.5) 10,368 (211.9) 1,723 (168.7) 13,653 (238.3) 2,358 (211.9) 52,071 (348.8) 8,103 (256.7) 60,174 (332.7)
Midwest 2,911 (90.5) 517 (65.1) 3,821 (109.5) 524 (74.1) 4,679 (121.3) 716 (90.0) 5,314 (137.9) 850 (105.0) 5,741 (195.8) 939 (149.9) 6,439 (216.1) 1,042 (159.7) 28,717 (343.7) 4,561 (236.9) 33,278 (323.7)
West 1,753 (85.9) 189 (68.6) 2,876 (89.3) 257 (80.5) 3,853 (112.2) 306 (90.7) 4,907 (130.1) 346 (84.9) 7,312 (204.6) 426 (128.9) 7,865 (233.0) 460 (164.7) 28,319 (367.3) 1,976 (232.2) 30,295 (353.9)

Source: Truven Health Analytics. Truven Health MarketScan research databases, commercial claims and encounters Medicare supplemental, data year 2009–2014. Ann Arbor, MI: Truven Health Analytics. http://truvenhealth.com/markets/life-sciences/products/data-tools/marketscan-databases
Abbreviations: BRCA = breast cancer (gene); metro = metropolitan; nonmetro = nonmetropolitan.
* Per 100,000 population of women aged 18-64 years who were enrolled in employer-sponsored health insurance in the MarketScan Commercial Claims and Encounters database. Pairwise comparison of BRCA testing rates in metropolitan versus nonmetropolitan areas were significantly different for each year and total across study years (chi-square test, p<0.05).
† Women who had BRCA testing for Ashkenazi mutations were excluded from the numerator but not the denominator.
§ Combined data for total sample of women aged 18–64 years corrected for multiyear enrollment. Data combined for women aged 18–64 years who had BRCA tests, 2009–2014, corrected for the <1% of women who had BRCA testing in >1 year.
During 2009–2014, the number of women aged 18–64 years included annually in the MarketScan Commercial Claims and Encounters databases ranged from as low as 15.5 million (in 2009) to as high as 20.6 million (in 2012) (Supplementary Table, https://stacks.cdc.gov/view/cdc/47271).
** Region percentages might not add up to 100% because of missing data.

Return to your place in the textFIGURE 1. BRCA testing rates* among women aged 18–64 years who were enrolled in employer-sponsored health insurance, in metropolitan and nonmetropolitan areas, by test subtype† — United States, 2009–2014
This figure shows four lines graphs showing the rate of women aged 18–64 years per 100,000 who had 1) any BRCA test, a BRCA full-gene sequencing test, a BRCA large rearrangement test, or a BRCA known mutation test during 2009–2014 in the United States, by metropolitan and nonmetropolitan areas.

Source: Truven Health Analytics. Truven Health MarketScan research databases, commercial claims and encounters Medicare supplemental, data year 2009–2014. Ann Arbor, MI: Truven Health Analytics. http://truvenhealth.com/markets/life-sciences/products/data-tools/marketscan-databases

Abbreviations: BRCA = breast cancer (gene); CPT = Current Procedural Terminology; HCPCS = Healthcare Common Procedure Coding System.

* The denominator is the total number of women aged 18–64 years enrolled in MarketScan Commercial Claims and Encounters databases at any point during that year.

† Three subtypes of BRCA tests were defined based on the following billing codes: full-gene sequencing (CPT codes 81211, 81214, and 81216 and HCPCS codes S3818, S3819, and S3820), known mutation tests (CPT codes 81215 and 81217 and HCPCS code S3822), and large rearrangement tests (CPT code 81213). The specific billing code for large rearrangement tests was introduced in 2012.

Return to your place in the textTABLE 2. Percentage of women who received preventive services* associated with BRCA testing among women aged 18–64 years† enrolled in employer-sponsored health insurance, in metropolitan and nonmetropolitan areas — United States, 2009–2014
Preventive service 2009 (%) 2010 (%) 2011 (%) 2012 (%) 2013 (%) 2014 (%) Total (%)§
Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Metro Nonmetro Total
N = 13,475 N = 1,533 N = 16,826 N = 1,977 N = 21,558 N = 2,576 N = 25,256 N = 2,945 N = 33,193 N = 3,560 N = 38,560 N = 4,610 N = 147,725 N = 17,112 N = 164,837
90 days 1 yr** 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr 90 days 1 yr
Mastectomy 8.1 11.5 7.8 12.5 9.0 13.2 9.8 13.5 9.6 14.0 10.4 15.3 9.4 13.2 8.8 12.2 7.6 11.1 6.7 10.8 6.5†† 9.5 5.7†† 8.6 8.1 11.8 7.8 11.6 8.1 11.7
MRI 8.7†† 14.1†† 5.9†† 9.7†† 8.9 14.8†† 7.7 12.2†† 10.3†† 15.8†† 8.2†† 12.8†† 9.4†† 13.5†† 7.5†† 10.8†† 8.1†† 13.3†† 6.7†† 10.4†† 7.3†† 11.3†† 5.8†† 8.6†† 8.6†† 13.4†† 6.8†† 10.5†† 8.4 13.1
Mammography 13.8†† 42.9 11.5†† 39.0 13.8 44.3 12.5 41.1 13.7†† 43.4 12.0†† 41.2 13.0 35.8†† 13.3 33.0†† 14.0 41.3 13.3 40.9 13.4 33.0 14.1 33.6 13.6 39.0†† 13.1 37.5†† 13.5 38.9
Genetic counseling 5.3†† — 3.8†† — 5.7†† — 3.8†† — 7.1†† — 4.3†† — 7.4†† — 3.6†† — 6.6†† — 4.7†† — 8.0†† — 5.2†† — 6.9†† — 4.4†† — 6.7 —

Source: Truven Health Analytics. Truven Health MarketScan research databases, commercial claims and encounters Medicare supplemental, data year 2009–2014. Ann Arbor, MI: Truven Health Analytics. http://truvenhealth.com/markets/life-sciences/products/data-tools/marketscan-databases
Abbreviations: BRCA = breast cancer (gene); CPT = Current Procedural Terminology; HCPCS = Healthcare Common Procedure Coding System; ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; MRI = magnetic resonance imaging; nonmetro = nonmetropolitan.
* Pairwise comparison of rates of preventive services, metropolitan versus nonmetropolitan, for each year and total across study years, by chi-square test.
† Women who had BRCA testing for Ashkenazi mutations were excluded from the analyses.
§ Data combined for women aged 18–64 years who had BRCA tests, 2009–2014, corrected for the <1% of women who had BRCA testing in >1 year.
Mastectomy, MRI, and mammography: within 90 days after BRCA testing; genetic counseling: within 90 days before and 90 days after BRCA testing. Preventive services were defined based on the following billing codes: mastectomy (CPT codes 19303 and 19304 and ICD-9-CM procedure codes 85.33–85.36 and 85.41–85.44), breast MRI (CPT code 77059), and screening and diagnostic mammography (HCPCS codes G0202, G0204, and G0206 and CPT codes 77055, 77056, and 77057).
** Within 1 year after BRCA testing.
†† p<0.05, chi-square test.

Return to your place in the textFIGURE 2. Percentage of women who received preventive services* associated with BRCA testing (within 90 days and 1 year of testing†) among women aged 18–64 years who were enrolled in employer-sponsored health insurance in metropolitan and nonmetropolitan areas§ — United States, 2009–2014
This figure shows two bar graphs displaying the percentage of women aged 18–64 years who received preventive services (i.e., mastectomy, magnetic resonance imaging, mammography, or genetic counseling) within 90 days and 1 year of BRCA testing, during 2009–2014 in the United States, by metropolitan and nonmetropolitan areas.

Source: Truven Health Analytics. Truven Health MarketScan research databases, commercial claims and encounters Medicare supplemental, data year 2009– 2014. Ann Arbor, MI: Truven Health Analytics. http://truvenhealth.com/markets/life-sciences/products/data-tools/marketscan-databases

Abbreviations: BRCA = breast cancer (gene); CPT = Current Procedural Terminology; HCPCS = Healthcare Common Procedure Coding System; ICD-9-CM = International Classification of Diseases, Ninth Revision, Clinical Modification; MRI = magnetic resonance imaging.

* Data combined for women aged 18–64 years who had BRCA tests, 2009–2014, corrected for the <1% of women who had BRCA testing in >1 year. Women who had BRCA testing for Ashkenazi mutations were excluded from the analyses..

† Mastectomy, MRI, and mammography: within 90 days or 1 year after BRCA testing; genetic counseling: 90 days before and 90 days after BRCA testing. Preventive services were defined based on the following billing codes: mastectomy (CPT codes 19303 and 19304 and ICD-9-CM procedure codes 85.33–85.36 and 85.41–85.44), breast MRI (CPT code 77059), and screening and diagnostic mammography (HCPCS codes G0202, G0204, and G0206 and CPT codes 77055, 77056, and 77057).

§ Nonmetropolitan areas had significantly (p<0.05, chi-square test) lower rates of MRI within 90 days or 1 year after testing, genetic counseling within 90 days before and 90 days after testing, and mammography within 1 year after testing.

Suggested citation for this article: Kolor K, Chen Z, Grosse SD, et al. BRCA Genetic Testing and Receipt of Preventive Interventions Among Women Aged 18–64 Years with Employer-Sponsored Health Insurance in Nonmetropolitan and Metropolitan Areas — United States, 2009–2014. MMWR Surveill Summ 2017;66(No. SS-15):1–11. DOI: http://dx.doi.org/10.15585/mmwr.ss6615a1.

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