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TABLE H-4 Lower and Upper Quartiles of Plasma Glucose (mmol/L) and Median Serum Ferritin Levels (μg/L), NHANES III (1988–1994)

Sex/Age Categorya

Lower Quartile of Plasma Glucose

Upper Quartile of Plasma Glucose

Median Plasma Glucose (mmol/L)

Median Serum Ferritin (μg/L)

Median Plasma Glucose (mmol/L)

Median Serum Ferritin (μg/L)

M 20 to 30 y

4.66

108.4

5.57

116.2

M 31 to 50 y

4.77

147.5

5.82

177.8

M 51 to 70 y

4.87

131.2

6.57

188.6

M 71+ y

4.95

122.8

6.72

149.4

F 20 to 30 y

4.41

33.0

5.23

37.3

F 31 to 50 y

4.55

36.4

5.62

44.8

F 51 to 70 y

4.74

73.6

6.19

119.5

F 71+ y

4.90

87.8

6.37

120.0

F P/L

4.17

21.6

5.00

22.0

NOTE: The plasma glucose values used for constructing the lower and upper quartile populations were estimated using WestVarPC 2.12. Median serum ferritin values and plasma glucose values also were estimated with WestVarPC 2.12. Plasma glucose values were measured for individuals 20 years and older. Only individuals who reported fasting 4 or more hours prior to the blood draw and individuals not taking insulin were included in the analyses. Population groups included only those individuals for whom complete food intakes were reported. 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.

a M = male, F = female, P/L = pregnant and lactating.

SOURCE: ENVIRON International Corporation, 1999.



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