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TABLE C-19 Mean and Percentiles for Usual Intake of Iron (mg/day) from Food and Supplements, NHANES III (1988–1994)

Sex/Age Categorya

Number of Persons Examined

Mean

Percentile

5th

10th

Both sexes, 2 to 6 mo

793

16.29

4.30

6.70

Both sexes, 7 to 12 mo

827

15.80

3.20

5.30

Both sexes, 1 to 3 y

3,309

10.36

3.60

4.60

Both sexes, 4 to 8 y

3,448

14.68

7.97

8.81

M 9 to 13 y

1,219

18.05

10.03

11.01

M 14 to 18 y

909

20.88

10.58

11.77

M 19 to 30 y

1,902

20.87

10.64

12.23

M 31 to 50 y

2,533

21.09

11.00

12.12

M 51 to 70 y

1,942

20.64

9.95

11.30

M 71+ y

1,255

20.95

9.33

10.41

F 9 to 13 y

1,216

14.63

8.13

8.89

F 14 to 18 y

949

13.24

6.88

7.63

F 19 to 30 y

1,901

16.76

7.42

8.49

F 31 to 50 y

2,939

17.11

7.61

8.66

F 51 to 70 y

2,065

16.83

7.54

8.27

F 71+ y

1,368

19.01

7.38

8.41

Pregnant

346

48.97

9.90

10.59

Lactating

99

58.51

12.29

13.19

All Individuals

28,575

17.78

8.04

9.33

All Indiv (+P/L)

29,015

18.34

8.04

9.34

NOTE: Data are limited to individuals who provided a complete and reliable 24-hour dietary recall on day 1. The intake distributions for infants 2–6 months, 7–12 months, and 1–3 years of age are unadjusted; the total nutrient intake is the sum of the unadjusted food intake and the daily supplement intake. For all other groups, individual total nutrient intakes were obtained as the sum of the adjusted individual usual intake from food alone and the daily supplement intake. The mean and percentiles of the estimated usual intake distributions were computed using SAS PROC UNIVARIATE. Infants and children fed human milk and 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. Females who were both pregnant and lactating were included in both the Pregnant and Lactating categories. The sample sizes for the Pregnant and Lactating categories were very small so their estimates of usual intake distributions are not reliable.



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