Maternal, pregnancy and newborn characteristics in diabetic versus non-diabetic twin pregnancies in the study population, U.S. 1995-2000 [16].

Data presented are n (%). P values are from Chi-square tests for differences between diabetic and non-diabetic pregnancies.*SGA=Small-for-gestational-age th percentile, LGA=large-for-gestational-age >90th percentile, according to birth weight percentiles in the study cohort.ʃAnyone or more of the following conditions: chronic hypertension, heart disease, acute or chronic lung disease, renal disease, genital herpes and RH sensitization.ʂThere were significant numbers (>10%) of missing information on smoking (17.8% missing) and mode of delivery (36.6% missing). The percentages of smokers and caesarean section were based on births without missing information.