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Table 8 Pooled weighted means of biological markers

From: Nutrient intakes and nutritional biomarkers in pregnant adolescents: a systematic review of studies in developed countries

Biological Marker

Pooled Mean

Confidence Interval

Target Value

Number of studies

Haemoglobin (g/dL)

112.4

95.4–133.8

110

9

25_OH_D (nmol/L)

55.9

6.2–105.7

25

6

Ferritin (μg/L)

18.2

0–48.3

15

4

Haematocrit (g/L)

32.5

28.0–39.4

33

4

Zinc (μmol/L-1)

11.5

5.9–17.1

6.12

3

B12 (pmol/L)

181.6

0–271.1

150

3

Serum Folate (nmol/L)

12.8

0–26.8

10

2

Selenium (μg/L)

61.8*

39.2–84.4

90

2

Homocystine (μmol/L)

7.6

0–17.0

Less than 13

2

  1. * Significant at the p<0.005 level