Table 3.

Bivariable and multivariable log-binomial regression models to assess factors associated with perinatal IPV† (n=216)

Covariables	RR (95% CI)	P value	aRR (95% CI)	P value
Maternal age in years (median, IQR)	0.95 (0.90 to 1.00)	0.082	0.99 (0.94 to 1.04)	0.660
EPDS score (continuous)	1.04 (1.00 to 1.10)	0.040	1.03 (1.00 to 1.07)	0.077
Nulliparous versus multiparous	1.33 (0.76 to 2.32)	0.319	1.18 (0.71 to 1.97)	0.529
Partner substance use increased	1.14 (0.60 to 2.17)	0.691	0.73 (0.42 to 1.25)	0.249
Household income below versus above Ottawa median*	3.66 (2.07 to 6.48)	<0.001	3.24 (1.87 to 5.59)	<0.001

*Missing data for household income were imputed by multiple imputation using chained equations and models were averaged across 10 imputed datasets.

†Outcome is defined as any reported regular controlling behaviour or act-based perinatal IPV (emotional, physical, sexual).

aRR, adjusted RR; EPDS, Edinburgh Postnatal Depression Survey; IPV, intimate partner violence; RR, risk ratio.