TABLE D-1 Continued

Sexa and Age

Number of Persons Examined

Selected Percentiles

   

Mean

1st

5th

F, 9 to 13 y

586

93.8

20.0

32.0

Standard error

 

3.9

2.3

2.7

F, 14 to 18 y

449

91.2

21.0

32.0

Standard error

 

5.1

2.9

3.4

F, 19 to 30 y

808

85.1

22.0

33.0

Standard error

 

3.6

2.8

3.0

F, 31 to 50 y

1,690

86.0

15.0

26.0

Standard error

 

2.3

0.9

1.1

F, 51 to 70 y

1,605

97.1

17.0

28.0

Standard error

 

11.2

3.8

1.6

F, 71+ y

670

94.3

15.0

27.0

Standard error

 

5.7

2.9

4.7

F, Pregnant

80

132.9

27.0

44.0

Standard error

 

13.7

9.5

10.2

F, Lactating

43

134.2

14.0

29.0

Standard error

 

21.9

9.6

12.8

All Individuals

15,951

99.7

17.0

29.0

Standard error

 

1.3

0.6

1.6

All Individuals (+P/L)

16,075

100.1

17.0

29.0

Standard error

 

1.3

0.8

1.5

NOTE: Estimated mean and standard deviation, and selected percentiles of the usual intake distribution of vitamin C, computed using intake from food sources alone. Dietary intake data are from CSFII, and the distribution was adjusted using C-SIDE and the method presented in Nusser SM, Carriquiry AL, Dodd KW, Fuller WA. 1996. A semiparametric transformation approach to estimating usual daily intake distributions. J Am Stat Assoc 91:1440–1449. Data corresponding to age groups 0–6 months, 7–12 months, and 1–3 years of age were not adjusted because no replicate vitamin C intake data are available for children under 3 years.



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