Important Analytic Considerations when using the NHANES-CMS Linked Data

Purpose

This module provides information about important analytic considerations when using the NHANES-CMS linked data and key concepts about defining a study population.

Task 1: Limitations of CMS data

The advantages of CMS data are that they are population-based, not subject to recall bias, and can be linked to NCHS population health surveys to expand the analytic potential of both data sources.  However because CMS data are collected for the purpose of making healthcare payments, and not for research, there are limitations to the data that you should consider when analyzing the NHANES-CMS linked data.

• Introduction
• Key concepts about the Limitations of Medicare data
• Key concepts about the Limitations of Medicaid data

 

Task 2: Assessment of a study population

One possible use of the NHANES-CMS linked data is to identify a study population with particular characteristics in NHANES and then to examine the health care utilization in CMS data.

The purpose of this task is to demonstrate how you might assess a study population for your analysis in order to determine if there are sufficient numbers for an analysis using the NHANES-CMS linked data Feasibility Files. In addition, this task will provide suggestions for further refinements to the study population that might be necessary when conducting the analysis.

• Key concepts for assessing a study population using the NHANES-Medicare linked data
• How to assess a study population using the NHANES-Medicare linked data
• Key concepts for assessing a study population using the NHANES-Medicaid linked data