Figure 3.

Adjusted Odds ratios for death among infants born alive and neonatal morbidity among survivors to 365 days between the Swedish healthcare regions (reference = Stockholm region), according to the time of death. Odds ratios are adjusted for gestational age (weeks) and (weeks²), multiple births (yes/no), gender and birthweight standard deviation score ²¹. Adjusted proportion of variation that can be explained by the regional difference (R²): death before 12 h: 22–24 weeks, 0.13; 22–26 weeks, 0.05. Death 0–365 days: 22–24 weeks, 0.06; 22–26 weeks 0.02. Neonatal morbidity: 22–24 weeks, 0.06; 22–26 weeks, 0.01. Neonatal morbidity includes any of retinopathy of prematurity stage ≥3 ¹⁹, intraventricular haemorrhage grade ≥3 ¹⁷, cystic periventricular leucomalacia ¹⁸ or severe bronchopulmonary dysplasia (need for at least 30% oxygen at 36 weeks of corrected age).