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. 2016 Dec 2;11(12):e0167495. doi: 10.1371/journal.pone.0167495

Table 4. Correlations between gestational age, body mass index, hemoglobin and trace elements.

Variable S. calcium S. magnesium S. zinc S. copper
r P r P r P r P
Gestational age, year 0.023 0.820 0. 119 0.237 0.007 0.941 ─ 0.094 0.351
Body mass index, Kg/m2 ─ 0.187 0.230 ─ 0.105 0.423 ─ 0.051 0.698 ─ 0.026 0.846
Hemoglobin, g/dl 0.031 0.794 0.272 0.018 0.014 0.224 0.102 0.381
Calcium, mg/dl ─ 0.077 0.446 ─ 0.125 0.217 0.166 0.098
Magnesium, mg/dl ─ 0.077 0.446 0.086 0.395 ─ 0.088 0.385
Zinc, µg/dl ─ 0.125 0.217 0.086 0.395 ─ 0.135 0.182