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Risk markers associated with (a) CHIPS primary perinatal outcome, (b) birthweight <10th centile, (c) severe hypertension, (d) preeclampsia, (e) delivery at <34 weeks and (f) delivery at <37 weeks in the final multivariable regression model. *Labetalol with or without other (not methyldopa) as the reference category. †The primary perinatal outcome was pregnancy loss or high level neonatal care for >48 h (until primary discharge home or 28 days of life, whichever was later).
