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TABLE C-25 Mean and Percentiles for Usual Intake of Zinc (mg/day) from Food, NHANES III (1988–1994)

Sex/Age Categorya

Number of Persons Examined

Mean

Percentile

5th

10th

Both sexes, 2 to 6 mo

793

5.51

2.60

3.20

Both sexes, 7 to 12 mo

827

6.11

2.90

3.50

Both sexes, 1 to 3 y

3,309

6.94

3.00

3.60

Both sexes, 4 to 8 y

3,448

8.95

6.40

6.90

Standard error

 

0.13

0.11

0.11

M 9 to 13 y

1,219

11.83

8.20

8.90

Standard error

 

0.25

0.19

0.19

M 14 to 18 y

909

15.12

8.30

9.30

Standard error

 

0.67

0.28

0.32

M 19 to 30 y

1,902

15.40

8.80

9.90

Standard error

 

0.36

0.25

0.25

M 31 to 50 y

2,533

14.83

8.60

9.60

Standard error

 

0.26

0.17

0.18

M 51 to 70 y

1,942

13.77

7.60

8.60

Standard error

 

0.27

0.16

0.17

M 71+ y

1,255

12.17

6.70

7.50

Standard error

 

0.53

0.20

0.22

F 9 to 13 y

1,216

9.64

6.50

7.10

Standard error

 

0.32

0.17

0.18

F 14 to 18 y

949

9.26

5.20

5.90

Standard error

 

0.32

0.19

0.20

F 19 to 30 y

1,901

9.52

5.40

6.10

Standard error

 

0.22

0.14

0.14

F 31 to 50 y

2,939

9.67

5.70

6.40

Standard error

 

0.17

0.10

0.10

F 51 to 70 y

2,065

9.19

5.30

5.90

Standard error

 

0.18

0.11

0.11

F 71+ y

1,368

8.62

5.00

5.50

Standard error

 

0.19

0.10

0.11

Pregnant

346

11.24

6.90

7.70

Standard error

 

0.50

0.47

0.47

Lactating

99

14.78

9.30

10.30

Standard error

 

0.93

0.60

0.61

All Individuals

28,575

11.27

6.10

6.90

Standard error

 

0.12

0.12

0.12

All Indiv (+P/L)

29,015

11.29

6.20

7.00

Standard error

 

0.13

0.14

0.14

NOTE: Data are limited to individuals who provided a complete and reliable 24-hour dietary recall on day 1. The intake distributions for 2–6 months, 7–12 months, and 1–3 years of age are unadjusted. Means and percentiles for these groups were computed using SAS PROC UNIVARIATE. For all other groups, data were adjusted using the Iowa State University method. Mean, standard errors, and percentiles were obtained using C-Side. Standard errors were estimated via jackknife replication. Each standard error has 49 degrees of freedom. 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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