Table 3.4.a. Serum transferrin saturation: Total population
Geometric mean and selected percentiles of serum concentrations (in %) for the total U.S. population aged1 year and older, National Health and Nutrition Examination Survey, 1999–2000.
Geometric mean and selected percentiles of serum concentrations (in %) for Mexican Americans in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2000.
Geometric mean and selected percentiles of serum concentrations (in %) for non-Hispanic blacks in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2000.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
10th
50th
90th
Males and Females
Total, 1 year and older
20.3
(19.5-21.2)
9.90
(9.30-10.8)
21.6
(20.5-22.7)
36.5
(34.4-39.0)
1773
1–5 years
18.3
(16.4-20.3)
10.2
(8.20-12.5)
19.0
(16.1-21.6)
30.7
(26.6-38.1)
171
6–11 years
19.6
(18.3-21.0)
10.8
(8.60-12.7)
21.3
(19.6-22.3)
31.0
(29.4-34.4)
257
12–19 years
19.7
(18.2-21.3)
10.0
(8.80-11.3)
21.3
(20.0-22.7)
34.9
(32.2-38.3)
582
20–39 years
20.8
(19.4-22.4)
8.90
(7.50-10.7)
22.1
(20.4-24.9)
38.4
(35.3-44.2)
273
40–59 years
20.9
(19.3-22.6)
10.7
(8.50-12.9)
21.4
(19.3-23.2)
37.6
(34.3-42.1)
249
60 years and older
20.2
(18.9-21.6)
11.4
(9.40-12.9)
21.2
(19.6-22.5)
34.9
(30.6-39.0)
241
Males
Total, 1 year and older
23.5
(22.4-24.8)
13.6
(12.5-14.7)
24.5
(22.5-26.1)
39.3
(36.2-41.8)
867
1–5 years
18.7
(16.6-21.2)
10.4†
(9.00-12.4)
19.0
(15.5-22.5)
30.2†
(24.6-40.8)
92
6–11 years
19.7
(17.8-21.7)
10.4
(7.90-13.7)
21.7
(18.9-24.0)
30.1
(28.0-34.3)
126
12–19 years
22.5
(21.3-23.8)
12.2
(11.1-14.4)
24.2
(22.4-25.6)
36.5
(33.6-39.3)
299
20–39 years
26.7
(24.8-28.8)
17.4
(14.3-19.8)
27.1
(24.9-30.1)
40.3
(35.7-45.8)
117
40–59 years
24.2
(21.7-27.0)
13.9
(10.9-16.3)
23.9
(21.4-28.0)
42.2
(37.1-46.8)
120
60 years and older
22.6
(20.8-24.4)
12.9
(11.4-15.8)
22.4
(20.6-24.3)
38.1
(32.1-41.6)
113
Females
Total, 1 year and older
17.8
(16.9-18.7)
8.60
(7.40-9.30)
19.2
(17.9-20.2)
34.3
(31.6-36.0)
906
1–5 years
17.7
(15.2-20.6)
9.40†
(5.30-12.7)
19.4
(14.7-21.8)
29.4†
(26.4-38.1)
79
6–11 years
19.5
(17.8-21.3)
11.5
(6.70-14.1)
21.0
(18.7-22.5)
32.7
(29.4-35.3)
131
12–19 years
17.1
(14.9-19.5)
8.10
(5.50-10.8)
18.9
(15.5-21.5)
32.3
(28.2-37.0)
283
20–39 years
16.9
(15.5-18.4)
7.30
(5.40-8.70)
18.0
(15.9-20.1)
37.4
(33.1-41.7)
156
40–59 years
18.5
(16.3-20.9)
9.90
(6.90-12.0)
19.9
(17.1-21.8)
31.5
(27.1-35.0)
129
60 years and older
18.6
(17.2-20.0)
9.40
(8.70-11.8)
19.9
(17.8-21.7)
31.3
(28.5-35.0)
128
† Estimate is subject to greater uncertainty due to small cell size.
Geometric mean and selected percentiles of serum concentrations (in %) for non-Hispanic whites in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2000.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
10th
50th
90th
Males and Females
Total, 1 year and older
22.9
(22.0-23.8)
12.6
(11.7-13.2)
24.0
(23.2-24.9)
39.6
(38.3-41.5)
2629
1–5 years
18.7
(16.9-20.6)
9.20
(6.80-11.4)
20.8
(16.5-23.9)
34.0
(29.2-36.7)
167
6–11 years
19.5
(17.9-21.2)
9.90
(8.50-11.6)
21.2
(17.0-23.2)
35.7
(32.0-38.8)
191
12–19 years
22.4
(21.1-23.8)
11.6
(10.2-13.2)
23.2
(21.8-24.1)
41.4
(36.3-44.8)
418
20–39 years
23.8
(22.3-25.5)
12.7
(10.9-14.6)
25.1
(23.5-26.3)
43.5
(40.9-45.2)
608
40–59 years
23.4
(22.0-24.8)
14.0
(12.8-15.1)
24.1
(22.8-25.8)
38.6
(35.6-41.5)
494
60 years and older
23.5
(22.3-24.7)
13.6
(12.4-14.7)
24.5
(23.3-25.6)
38.5
(36.8-39.4)
751
Males
Total, 1 year and older
25.1
(23.9-26.4)
14.4
(13.3-15.3)
25.9
(24.5-27.1)
43.0
(40.2-45.2)
1305
1–5 years
18.5
(16.4-20.8)
9.10†
(6.80-12.3)
20.1
(16.5-23.1)
33.2†
(28.8-36.7)
89
6–11 years
19.2
(17.1-21.7)
9.90†
(6.10-11.7)
21.6
(17.5-23.4)
32.4†
(28.7-36.4)
101
12–19 years
25.3
(22.8-28.0)
13.4
(11.3-14.5)
26.0
(23.0-29.0)
45.2
(38.4-57.1)
213
20–39 years
27.0
(26.2-27.9)
16.4
(14.5-18.0)
26.7
(25.2-28.8)
46.3
(44.1-48.9)
264
40–59 years
26.2
(24.0-28.6)
16.1
(14.1-18.5)
26.2
(24.6-29.2)
40.5
(38.6-43.8)
253
60 years and older
25.3
(24.0-26.7)
14.2
(13.0-15.9)
26.1
(25.0-27.8)
41.9
(39.2-45.4)
385
Females
Total, 1 year and older
20.9
(20.1-21.7)
11.5
(10.4-12.4)
22.0
(21.1-22.9)
36.6
(34.0-39.2)
1324
1–5 years
19.0
(16.4-21.9)
9.20†
(5.10-11.9)
21.1
(15.4-24.5)
34.2†
(29.7-41.2)
78
6–11 years
19.8
(16.8-23.4)
10.2†
(6.60-12.8)
21.1
(15.3-26.2)
38.4†
(34.7-40.6)
90
12–19 years
19.6
(17.4-22.0)
10.1
(9.00-13.6)
19.9
(18.1-22.6)
33.0
(30.7-38.7)
205
20–39 years
21.1
(18.9-23.5)
10.9
(7.80-13.0)
23.0
(19.4-26.3)
39.2
(35.0-42.6)
344
40–59 years
20.8
(19.9-21.7)
12.4
(10.9-13.8)
21.9
(20.4-22.9)
35.6
(31.5-41.0)
241
60 years and older
22.1
(20.8-23.5)
13.1
(11.4-14.8)
22.8
(21.3-24.4)
36.1
(31.8-38.4)
366
† Estimate is subject to greater uncertainty due to small cell size.
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