TABLE C-7 Total (Diet + Supplements) Selenium Intake (µg): Mean and Selected Percentiles, United States, NHANES III, 1988 –1994

Sexa and Age

Number of Persons Examined

Selected Percentiles

   

Mean

1st

5th

Both sexes, 0–6 mo

793

35.3

17.2

24.0

Both sexes, 7–12 mo

827

49.7

25.7

31.8

Both sexes, 1–3 y

3,309

69.2

32.7

43.3

Both sexes, 4–8 y

3,456

87.0

49.4

58.2

M, 9–13 y

1,223

116.6

58.2

72.4

M, 14–18 y

914

143.8

68.7

87.9

M, 19–30 y

1,906

160.9

81.6

103.4

M, 31–50 y

2,536

154.1

74.2

94.3

M, 51–70 y

1,946

136.2

65.8

80.9

M, 71+ y

1,257

116.4

57.8

71.4

F, 9–13 y

1,241

92.5

53.6

65.3

F, 14–18 y

697

88.7

41.6

56.4

F, 19–30 y

1,084

105.1

53.9

63.9

F, 31–50 y

2,587

103.5

56.7

67.0

F, 51–70 y

2,080

98.4

53.6

63.3

F, 71+ y

1,370

87.7

47.0

56.5

Pregnant

211

123.9

52.0

82.5

Lactating

96

132.9

79.3

97.4

All individual (+P/L)

27,528

116.1

42.9

57.7

All individuals

27,226

116.0

43.1

57.8

NOTE: Estimated mean and standard deviation, and selected percentiles of the usual intake distribution of selenium, computed using intakes from food and supplement sources. Dietary intake data are from NHANES III. Intakes from food were adjusted using C-SIDE and the method presented by Nusser SM, Carriquiry AL, Dodd KW, Fuller WA. 1996. A semiparametric transformation approach to estimating usual daily intake distribution. J Am Stat Assoc 91:1440–1449. However, intakes from supplements are unadjusted, so the day-to-day variability in takes may not have been totally removed from the data. Standard errors were not available for this data set.



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