TABLE C-1 Continued

Sexa and Age

Number of Persons Examined

Selected Percentiles

   

Mean

1st

5th

F, 9–13 y

1,279

103.2

47.0

60.0

Standard error

 

5.7

2.4

2.9

F, 14–18 y

707

94.4

32.0

44.0

Standard error

 

6.3

2.8

3.6

F, 19–30 y

1,106

84.1

31.0

42.0

Standard error

 

4.7

2.8

3.6

F, 31–50 y

2,644

90.0

32.0

43.0

Standard error

 

2.6

1.9

2.1

F, 51–70 y

2,143

102.4

35.0

49.0

Standard error

 

3.5

2.1

2.3

F, 71+ y

1,436

102.8

45.0

58.0

Standard error

 

2.6

1.8

1.9

Pregnant

214

124.0

49.0

65.0

Standard error

 

11.3

6.4

9.4

Lactating

100

136.8

50.0

65.0

Standard error

 

21.0

13.8

20.2

All individuals (+P/L)

29,022

105.5

46.0

58.0

Standard error

 

1.3

3.5

3.2

All individuals

28,714

105.3

45.0

58.0

Standard error

 

1.2

3.3

3.0

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 NHANES III, 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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