Pregnancy planning, smoking behaviour during pregnancy, and neonatal outcome: UK millennium cohort study

Table 2 Association between pregnancy planning status and neonatal outcome

	Neonatal outcome	Neonatal outcome in
	in mothers who	mothers who did not	Crude¹		Adjusted model 1 *		Adjusted model 2 **
	planned pregnancy	plan pregnancy
	n/N (%)	n/N (%)	OR	(95% CI)	OR	(95% CI)	OR	(95% CI)
Low birth weight (<2.5 kg)	541/10,394 (5.21)	561/7,762(7.22)	1.42	(1.22-1.65)	1.27	(1.06-1.51)	1.24	(1.04-1.48)
Prematurity (< 37 weeks gestation)	653/10,359 (6.30)	626/7,675 (8.16)	1.32	(1.15-1.52)	1.23	(1.05-1.45)	1.24	(1.05-1.45)

¹The baseline group was women who had planned their pregnancy.
*All adjusted for: mother’s age, deprivation, relationship status, fertility treatment. Prematurity also adjusted for BMI.
**Adjusted for the same variables as model 1 plus smoking.

ISSN: 1471-2393