TABLE 3—

Multilevel Logistic Regression of Factors Associated With Age-Appropriate Restraint Use: South West Sydney, New South Wales, Australia, 2010

Variable	Univariate OR (95% CI)	Multivariate AOR (95% CI)
Individual-level factors
Child < 4 y	0.20 (0.10, 0.38)	0.14 (0.07, 0.30)
Parent < 36 y	0.56 (0.30, 1.05)
Household income < AUD $60 000	0.53 (0.29, 0.98)
Knows a forward-facing restraint offers a 3-year-old child greater benefit than a booster seat	2.20 (1.15, 4.21)
Belief that child travels same way as other children	2.12 (0.94, 4.77)
Cost prevents parent buying their preferred restraint	0.48 (0.26, 0.88)
At least 3 children in family	0.47 (0.26, 0.88)	0.34 (0.17, 0.68)
Restraint was bought within the previous 6 mo	1.36 (0.60, 3.06)
Restraint had been checked by restraint fitter in last 6 mo	0.98 (0.51, 1.87)
Parent report of restraint information
Parent reported having received restraint information at an information session at center	2.39 (1.20, 4.78)	3.66 (1.62, 8.29)
Parent reported having received information via brochures	2.46 (1.35, 4.48)
Parent reported having received information via DVD	1.79 (0.92, 3.48)
Center-level factors
Children’s education well implemented	1.35 (0.98, 1.88)
No new staff	0.78 (0.44, 1.38)
Observer’s perceived measure of support from center staff	1.54 (0.97, 2.43)
Total no. restraints bought at center	1.08 (0.99, 1.18)
Total no. restraints fitted at center	1.05 (0.99, 1.11)

Note. AOR = adjusted odds ratio; CI = confidence interval; OR = odds ratio. All models were adjusted for clustering by center. ORs were for optimal restraint use; AORs were adjusted for other variables in the column.