Odds ratios (OR) and 95% confidence intervals (CI) for association between opium and tobacco use during pregnancy and risk of caesarean section preterm delivery1.

Odds ratios (OR) and 95% confidence intervals (CI) for association between opium and tobacco use during pregnancy and risk of caesarean section preterm delivery1.本数据集提供了孕期鸦片与烟草使用和剖宫产早产风险之间关联的比值比（Odds Ratio, OR）及95%置信区间（Confidence Interval, CI）1。