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TABLE I-4 Estimated Percentiles of the Distribution of Iron Requirements (mg/d) for Female Adolescents and Adults, CSFII (1994–1996)

Estimated Percentile of Requirement

Group

9–13 y

14–18 y

Oral Contraceptive User,a Adolescent

Mixed Adolescent Populationb

Menstruating Adult

Oral Contraceptive User,a Adult

Mixed Adult Populationb

Post Menopause

2.5

3.24

4.63

4.11

4.49

4.42

3.63

4.18

2.73

5

3.60

5.06

4.49

4.92

4.88

4.00

4.63

3.04

10

4.04

5.61

4.97

5.45

5.45

4.45

5.19

3.43

20

4.59

6.31

5.57

6.14

6.22

5.06

5.94

3.93

30

4.98

6.87

6.05

6.69

6.87

5.52

6.55

4.30

40

5.33

7.39

6.48

7.21

7.46

5.94

7.13

4.64

50c

5.66

7.91

6.89

7.71

8.07

6.35

7.73

4.97

60

6.00

8.43

7.34

8.25

8.76

6.79

8.39

5.30

70

6.36

9.15

7.84

8.92

9.63

7.27

9.21

5.68

80

6.78

10.03

8.47

9.77

10.82

7.91

10.36

6.14

90

7.38

11.54

9.47

11.21

13.05

8.91

12.49

6.80

95

7.88

13.08

10.42

12.74

15.49

9.90

14.85

7.36

97.5d

8.34

14.80

11.44

14.39

18.23

10.94

17.51

7.88

aBased on 60 percent reduction in menstrual blood loss.

bMixed population assumes 17 percent oral contraceptive users, 83 percent nonusers, all menstruating.

cFiftieth percentile = Estimated Average Requirement.

dNinety-seven and one-half percentile = Recommended Dietary Allowance.



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