Table 2.

Frequencies of maternal outcomes at the time of birth of all Aboriginal mothers by smoking status during pregnancy

	All births		Non-smoking		Smoking		Unadjusted	Adjusted
	n=18 154		Nns=9235		Ns=8919		RR (95% CI)	RR (95% CI)
	n	%	n	%	n	%
Severe maternal morbidity
Yes	523	2.9	257	2.8	266	3.0	0.94 (0.79 to 1.12)	0.92* (0.77 to 1.11)
Inter-hospital transfer
Yes	793	4.4	337	3.7	456	5.1	0.73 (0.63 to 0.84)	0.76† (0.66 to 0.89)

*Adjusted for maternal age, any hypertension, any diabetes, parity and socioeconomic status (Socio-Economic Index for Areas (SEIFA)).

†Adjusted for maternal age, any hypertension, any diabetes, parity and remoteness area.

RR, relative risk.