Geometric mean and selected percentiles of serum concentrations (in ng/mL) for the total U.S. population aged1 year and older, National Health and Nutrition Examination Survey, 1999–2002.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
5th
50th
95th
Males and Females
Total, 1 year and older
60.2
(58.3-62.1)
9.00
(9.00-10.0)
62.0
(59.0-64.0)
343
(329-359)
16656
1–5 years
21.5
(20.3-22.9)
6.00
(3.00-8.00)
21.0
(20.0-23.0)
62.0
(53.0-77.0)
1523
6–11 years
29.8
(28.1-31.5)
11.0
(11.0-13.0)
30.0
(28.0-31.0)
74.0
(67.0-83.0)
1909
12–19 years
32.8
(31.4-34.3)
8.00
(6.00-9.00)
34.0
(32.0-35.0)
115
(103-125)
4340
20–39 years
62.2
(58.9-65.6)
8.00
(7.00-10.0)
71.0
(66.0-76.0)
301
(272-321)
3186
40–59 years
80.8
(76.7-85.0)
9.00
(7.00-11.0)
93.0
(88.0-96.0)
404
(379-433)
2680
60 years and older
101
(95.5-107)
19.0
(16.0-22.0)
105
(97.0-112)
481
(434-518)
3018
Males
Total, 1 year and older
93.0
(89.3-96.8)
16.0
(15.0-17.0)
101
(97.0-107)
416
(391-439)
8142
1–5 years
20.2
(18.7-21.7)
3.00
(3.00-6.00)
20.0
(19.0-22.0)
62.0
(50.0-79.0)
805
6–11 years
29.7
(27.3-32.3)
11.0
(9.00-12.0)
31.0
(29.0-32.0)
73.0
(64.0-83.0)
972
12–19 years
44.3
(41.6-47.1)
15.0
(13.0-17.0)
42.0
(40.0-45.0)
142
(125-154)
2172
20–39 years
129
(122-137)
41.0
(34.0-46.0)
134
(125-142)
382
(344-406)
1356
40–59 years
145
(135-157)
32.0
(24.0-42.0)
150
(138-168)
500
(434-574)
1340
60 years and older
127
(118-136)
21.0
(18.0-24.0)
134
(125-147)
552
(493-623)
1497
Females
Total, 1 year and older
39.7
(38.1-41.4)
6.00
(6.00-8.00)
39.0
(37.0-41.0)
213
(198-228)
8514
1–5 years
23.2
(21.8-24.8)
7.00
(5.00-9.00)
23.0
(22.0-25.0)
69.0
(52.0-88.0)
718
6–11 years
29.9
(28.2-31.7)
12.0
(10.0-14.0)
30.0
(27.0-31.0)
76.0
(67.0-83.0)
937
12–19 years
24.0
(22.7-25.3)
5.00
(3.00-7.00)
26.0
(24.0-27.0)
76.0
(70.0-85.0)
2168
20–39 years
30.4
(28.6-32.4)
< LOD
32.0
(30.0-35.0)
126
(110-146)
1830
40–59 years
45.6
(42.8-48.6)
4.00
(3.00-6.00)
53.0
(46.0-57.0)
228
(201-243)
1340
60 years and older
84.9
(79.7-90.4)
15.0
(14.0-21.0)
86.0
(80.0-93.0)
391
(349-445)
1521
< LOD means less than the limit of detection, which may vary for some compounds by year. See Appendix D for LOD.
Geometric mean and selected percentiles of serum concentrations (in ng/mL) for Mexican Americans in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2002.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
5th
50th
95th
Males and Females
Total, 1 year and older
46.6
(43.4-50.1)
7.00
(6.00-8.00)
44.0
(40.0-47.0)
298
(265-334)
4946
1–5 years
19.0
(18.2-19.9)
5.00
(3.00-7.00)
19.0
(18.0-20.0)
48.0
(45.0-54.0)
515
6–11 years
27.7
(26.1-29.5)
12.0
(10.0-13.0)
27.0
(25.0-28.0)
70.0
(59.0-81.0)
651
12–19 years
29.9
(28.1-31.8)
6.00
(3.00-7.00)
32.0
(29.0-34.0)
114
(101-122)
1639
20–39 years
56.8
(51.9-62.2)
6.00
(3.00-8.00)
67.0
(60.0-74.0)
300
(256-336)
867
40–59 years
76.0
(67.5-85.6)
< LOD
97.0
(81.0-111)
463
(409-589)
634
60 years and older
100
(91.8-110)
18.0
(12.0-24.0)
102
(90.0-120)
433
(342-568)
640
Males
Total, 1 year and older
77.1
(72.9-81.6)
14.0
(13.0-16.0)
85.0
(77.0-91.0)
373
(317-408)
2422
1–5 years
19.0
(18.0-20.0)
5.00
(3.00-7.00)
19.0
(18.0-21.0)
48.0
(42.0-59.0)
268
6–11 years
28.4
(26.3-30.7)
12.0
(11.0-14.0)
27.0
(25.0-29.0)
70.0
(56.0-88.0)
337
12–19 years
43.2
(40.5-46.2)
14.0
(10.0-16.0)
42.0
(40.0-46.0)
131
(121-143)
812
20–39 years
121
(112-131)
39.0
(31.0-51.0)
122
(111-134)
349
(298-395)
383
40–59 years
160
(142-180)
44.0
(33.0-53.0)
159
(142-177)
646
(457-959)
301
60 years and older
122
(105-143)
19.0
(13.0-28.0)
136
(102-162)
569
(364-831)
321
Females
Total, 1 year and older
26.9
(24.2-30.0)
< LOD
27.0
(24.0-29.0)
161
(123-201)
2524
1–5 years
19.1
(17.6-20.8)
5.00
(3.00-8.00)
20.0
(17.0-20.0)
47.0
(44.0-56.0)
247
6–11 years
27.0
(24.7-29.6)
12.0
(8.00-14.0)
27.0
(24.0-29.0)
68.0
(59.0-84.0)
314
12–19 years
20.0
(18.3-21.9)
< LOD
22.0
(19.0-24.0)
69.0
(59.0-77.0)
827
20–39 years
23.3
(20.6-26.3)
< LOD
24.0
(22.0-26.0)
98.0
(78.0-144)
484
40–59 years
35.2
(29.2-42.4)
< LOD
38.0
(32.0-44.0)
293
(195-385)
333
60 years and older
84.6
(76.6-93.4)
17.0
(11.0-24.0)
87.0
(76.0-100)
324
(237-375)
319
< LOD means less than the limit of detection, which may vary for some compounds by year. See Appendix D for LOD.
Geometric mean and selected percentiles of serum concentrations (in ng/mL) for non-Hispanic blacks in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2002.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
5th
50th
95th
Males and Females
Total, 1 year and older
59.2
(55.6-62.9)
8.00
(6.00-10.0)
58.0
(54.0-62.0)
381
(342-423)
3898
1–5 years
25.9
(23.9-28.1)
8.00
(5.00-10.0)
25.0
(24.0-28.0)
73.0
(62.0-98.0)
415
6–11 years
36.8
(34.7-39.0)
15.0
(13.0-17.0)
36.0
(34.0-38.0)
86.0
(78.0-91.0)
604
12–19 years
32.9
(31.3-34.6)
7.00
(6.00-10.0)
33.0
(31.0-36.0)
122
(110-132)
1258
20–39 years
54.4
(48.0-61.6)
< LOD
63.0
(56.0-73.0)
313
(266-368)
592
40–59 years
96.9
(86.7-108)
7.00
(6.00-12.0)
111
(100-129)
482
(425-642)
543
60 years and older
133
(118-150)
22.0
(18.0-31.0)
141
(125-162)
613
(509-724)
486
Males
Total, 1 year and older
92.8
(87.2-98.8)
17.0
(16.0-19.0)
98.0
(90.0-108)
452
(420-494)
1917
1–5 years
24.6
(21.8-27.7)
7.00†
(3.00-10.0)
24.0
(21.0-27.0)
69.0†
(57.0-122)
215
6–11 years
36.1
(33.6-38.7)
16.0
(13.0-18.0)
34.0
(31.0-38.0)
79.0
(75.0-90.0)
304
12–19 years
44.1
(42.1-46.1)
14.0
(12.0-16.0)
43.0
(40.0-46.0)
146
(128-171)
642
20–39 years
137
(126-150)
35.0
(24.0-52.0)
150
(137-161)
381
(325-450)
249
40–59 years
176
(156-199)
42.0
(30.0-53.0)
178
(157-206)
642
(494-984)
275
60 years and older
159
(135-186)
26.0
(18.0-34.0)
173
(132-204)
710
(521-851)
232
Females
Total, 1 year and older
40.1
(36.5-44.2)
6.00
(3.00-7.00)
40.0
(37.0-42.0)
267
(246-297)
1981
1–5 years
27.5
(25.0-30.2)
10.0†
(7.00-12.0)
26.0
(24.0-30.0)
73.0†
(56.0-96.0)
200
6–11 years
37.6
(34.8-40.6)
16.0
(12.0-17.0)
37.0
(33.0-41.0)
88.0
(73.0-107)
300
12–19 years
24.5
(22.3-26.8)
3.00
(3.00-6.00)
24.0
(22.0-29.0)
91.0
(78.0-104)
616
20–39 years
26.6
(22.0-32.2)
< LOD
31.0
(24.0-34.0)
142
(102-232)
343
40–59 years
57.4
(50.1-65.8)
6.00
(3.00-6.00)
61.0
(52.0-75.0)
343
(255-481)
268
60 years and older
118
(101-138)
21.0
(8.00-30.0)
131
(107-151)
534
(396-613)
254
< LOD means less than the limit of detection, which may vary for some compounds by year. See Appendix D for LOD.
† Estimate is subject to greater uncertainty due to small cell size.
Geometric mean and selected percentiles of serum concentrations (in ng/mL) for non-Hispanic whites in the U.S.population aged 1 year and older, National Health and Nutrition Examination Survey, 1999–2002.
Geometric mean (95% conf. interval)
Selected percentiles (95% conf. interval)
Sample size
5th
50th
95th
Males and Females
Total, 1 year and older
63.0
(60.4-65.6)
11.0
(10.0-11.0)
65.0
(63.0-69.0)
343
(327-357)
6360
1–5 years
21.3
(19.2-23.6)
5.00
(3.00-8.00)
21.0
(19.0-23.0)
61.0
(46.0-80.0)
420
6–11 years
28.4
(26.0-31.1)
10.0
(9.00-12.0)
30.0
(27.0-32.0)
69.0
(59.0-83.0)
496
12–19 years
32.9
(31.0-34.8)
8.00
(7.00-11.0)
34.0
(31.0-36.0)
107
(95.0-122)
1075
20–39 years
64.3
(59.6-69.5)
9.00
(7.00-12.0)
74.0
(66.0-81.0)
293
(261-328)
1382
40–59 years
79.8
(75.7-84.1)
10.0
(9.00-12.0)
91.0
(85.0-96.0)
386
(349-406)
1280
60 years and older
97.9
(92.2-104)
17.0
(15.0-21.0)
102
(94.0-110)
448
(393-503)
1707
Males
Total, 1 year and older
96.0
(91.4-101)
16.0
(14.0-18.0)
107
(99.0-115)
414
(391-435)
3127
1–5 years
19.4
(17.3-21.8)
< LOD
19.0
(17.0-21.0)
61.0
(42.0-79.0)
226
6–11 years
28.4
(24.8-32.6)
11.0
(9.00-14.0)
29.0
(27.0-33.0)
68.0
(50.0-97.0)
261
12–19 years
42.9
(39.7-46.4)
14.0
(10.0-17.0)
43.0
(39.0-46.0)
127
(111-143)
536
20–39 years
131
(121-141)
43.0
(32.0-49.0)
135
(124-144)
382
(331-416)
577
40–59 years
139
(127-153)
31.0
(18.0-39.0)
144
(132-168)
453
(409-517)
668
60 years and older
125
(116-135)
20.0
(18.0-25.0)
135
(122-148)
531
(471-601)
859
Females
Total, 1 year and older
41.7
(39.5-44.0)
8.00
(6.00-9.00)
41.0
(39.0-44.0)
205
(193-227)
3233
1–5 years
23.6
(20.9-26.8)
8.00†
(5.00-11.0)
24.0
(20.0-26.0)
59.0†
(42.0-98.0)
194
6–11 years
28.4
(25.9-31.2)
10.0
(9.00-14.0)
28.0
(25.0-31.0)
73.0
(56.0-83.0)
235
12–19 years
24.8
(23.0-26.6)
7.00
(3.00-8.00)
26.0
(25.0-28.0)
71.0
(61.0-85.0)
539
20–39 years
32.0
(29.1-35.2)
5.00
(3.00-8.00)
34.0
(29.0-40.0)
127
(108-149)
805
40–59 years
45.2
(41.8-48.8)
6.00
(3.00-8.00)
51.0
(45.0-57.0)
206
(181-235)
612
60 years and older
80.7
(75.7-86.1)
16.0
(13.0-22.0)
83.0
(77.0-89.0)
353
(296-391)
848
< LOD means less than the limit of detection, which may vary for some compounds by year. See Appendix D for LOD.
† Estimate is subject to greater uncertainty due to small cell size.
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