Neonatal mortality in diabetic versus non-diabetic twin pregnancies, U.S. matched multiple birth data 1995-2000 [16].

HR = Hazard ratio; CI = confidence interval
*Hazard ratios adjusted for maternal race, age, education, marital status, parity, smoking, other maternal major illnesses, fetal sex, mode of delivery and twin-cluster level dependence in Cox proportional hazard models.
ʃGestational age group-specific mortality rates and hazard ratios were calculated using the fetuses-at-risk denominator including all fetuses at risk of death (both born and unborn babies).
ʂP value in test for interaction with diabetes in pregnancy in relation to the risk of neonatal mortality.

HR为风险比（Hazard ratio），CI为置信区间（confidence interval）。
*在Cox比例风险模型中，风险比已针对产妇种族、年龄、学历、婚姻状况、产次、吸烟史、其他母体重大疾病、胎儿性别、分娩方式及双胎集群水平的相关性进行校正。
ʃ采用包含所有存在死亡风险的胎儿（含已娩出与未娩出胎儿）的「高危胎儿队列分母」，计算了胎龄组特异性死亡率与风险比。
ʂ该P值来自针对妊娠期糖尿病与新生儿死亡风险之间交互作用的统计学检验。