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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