Pregnancy risk factors associated with birthweight of infants born to Australian Aboriginal women in an urban setting - a retrospective cohort study

Table 2 Multivariable linear regression analysis for variables associated with a) birthweight and b) birthweight z-score – all variables are adjusted for the presence of all others

	a) birthweight (g)			a) birthweight z-score
	Mean difference ^a	95% CI	p-value	Mean difference ^a	95% CI	p-value
Aboriginal status	44	−22, 110	0.19	0.102	− 0.050, 0.254	0.19
In-utero transfer	−74	−102, −45	< 0.001	−0.173	− 0.244, − 0.102	< 0.001
Maternal age < 20	−82	−117, −46	< 0.001	−0.185	− 0.264, − 0.106	< 0.001
BMI > 25	122	113, 131	< 0.001	0.266	0.247, 0.286	< 0.001
Smoking throughout pregnancy	−104	−123, −85	< 0.001	−0.222	− 0.265, − 0.179	< 0.001
Alcohol use	−37	− 93, 19	0.20	− 0.064	− 0.192, 0.063	0.32
Drug use	−93	− 123, − 63	< 0.001	− 0.210	− 0.279, − 0.140	< 0.001
Mental health diagnosis	51	40, 62	< 0.001	0.113	0.088, 0.137	< 0.001
APH > 20/40	−31	−49, − 13	0.001	− 0.040	− 0.082, 0.001	0.057
UTI in pregnancy	1	−60, 61	0.98	0.004	−0.131, 0.139	0.95
Hypertension^b	−25	−50, −1	0.042	−0.054	−0.111, 0.002	0.06
Diabetes	50	31, 69	< 0.001	0.176	0.132, 0.219	< 0.001
Pre-eclampsia/HELLP	−213	− 248, −178	< 0.001	−0.543	−0.629, − 0.458	< 0.001
Male sex	137	129, 145	< 0.001	−0.010	−0.028, 0.008	0.28
Gestational age (per week)	182	180, 184	< 0.001	−0.019	−0.025, − 0.014	< 0.001

ISSN: 1471-2393