The results did not substantially change when we (1) repeated analyzes in the propensity-score-matched (PSM) sub-cohort (Supplementary Table 3 ); (2) adjusted for maternal smoking or body-mass index (BMI) in early pregnancy, in addition to factors included in the main model; (3) ...
ICD-10 codes G80 to G83 in 1996 to 2008; ICD-9 codes 342 to 344 in 1991 to 1995 Matched or adjusted variables Neonatal wards, GA, sex, birth date and type of delivery NA Neonatal ward, GA Pregnancy disorders, sociodemographic factors and year of birth Time of birth, gestational age,...