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TABLE G-6 Mean and Percentiles for Urinary Iodine (μg/dL), NHANES III (1988–1994)

Sex/Age Categorya

n

Mean

SEMb

Percentile

5th

10th

Both sexes, 6 to 8 y

1,369

30.0

1.7

6.0

9.2

M 9 to 13 y

1,184

96.1

73.7

7.0

9.0

M 14 to 18 y

876

26.0

1.4

6.0

8.4

M 19 to 30 y

1,852

21.3

0.9

3.8

5.7

M 31 to 50 y

2,481

18.2

0.7

2.9

4.6

M 51 to 70 y

1,896

29.7

6.2

3.6

4.6

M 71+ y

1,181

33.0

4.1

4.4

5.8

F 9 to 13 y

1,146

23.3

1.0

4.6

7.0

F 14 to 18 y

897

26.9

2.8

4.4

6.2

F 19 to 30 y

1,860

31.9

13.4

2.9

4.6

F 31 to 50 y

2,886

18.8

1.6

2.1

2.9

F 51 to 70 y

2,009

23.5

1.8

2.4

3.3

F 71+ y

1,228

39.7

11.5

3.5

4.4

F Pregnant

343

19.6

1.1

4.3c

5.8

F Lactating

95

16.1c

2.2

2.5c

2.9c

F P/L

433

18.7

1.0

3.7c

5.4

All Individuals

20,865

27.6

2.7

3.0

4.5

All Indiv (+P/L)

21,298

27.5

2.7

3.0

4.5

NOTE: Means, standard errors, and percentiles calculated with WesVar Complex Samples 3.0. Females who had "blank but applicable" pregnancy and lactating status data or who responded "I don't know" to questions on pregnancy and lactating status were excluded from all analyses.

a M = male, F = female, P/L = pregnant and lactating.

b SEM = standard error of the mean.



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