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Table 3 Correlations among zinc, copper, and birth weight

From: Zinc and copper levels in low birth weight deliveries in Medani Hospital, Sudan

Variables Maternal zinc Maternal copper Cord zinc Cord copper
r P r P r P r P
Birth weight 0.27 0.005 0.19 0.05 0.35 0.01 0.1 0.23
Maternal zinc    0.39  < 0.001 0.29 0.003 0.13 0.16
Maternal copper 0.39  < 0.001    0.18 0.07 0.04 0.63
Cord zinc 0.29 0.003      0.004 0.96