[A case-control study on the relationship between neonatal hyperbilirubaemia and usage of oxytocin during labour]

Analytical method for multiple exposure level data of matching (1:1) case-control study was employed in the study on the relationship between neonatal hyperbilirubinemia and usage of oxytocin (during) in labour. The result showed that there was significant association between them (chi 2 = 15.538, df = 3, P = 0.0014). The odds ratios for various exposure level were 1-5.9 (u): OR = 1.085; 6-8.9 (u): OR = 5.5; 9 + (u): OR = 3.687 and the log linear trend among them was significant (chi 2 = 11.991, df = 1, P = 0.0005).