Table 3.

The effect of safety promotion intervention on the reduction of home safety problems

	Attention-control group			Safety intervention group			Estimated difference in change* (intervention vs control)	p Value
	Mean M (SD)†	Estimated change in mean* M (SE)	p Value	Mean M (SD)†	Estimated change in mean* M (SE)	p Value
Analysis among the total sample (intent-to-treat, n=186 control, n=91 intervention)
Home safety problem score
Baseline	2.52 (1.58)			2.36 (1.58)
Six-month follow-up	2.22 (1.44)	−0.21 (0.15)	0.169	1.73 (1.55)	−0.53 (0.23)	0.021	−0.32 (0.27)	0.244
Twelve-month follow-up	2.43 (1.86)	−0.04 (0.15)	0.794	1.81 (1.44)	−0.58 (0.21)	0.006	−0.54 (0.25)	0.035
Analysis of intervention effect among compliers only (n=131 control, n=65 intervention)‡
Home safety problem score
Baseline	2.43 (1.46)			2.33 (1.69)
Six-month follow-up	2.17 (1.42)	−0.21 (0.16)	0.199	1.50 (1.17)	−0.77 (0.24)	0.002	−0.55 (0.29)	0.060
Twelve-month follow-up	2.30 (1.79)	−0.09 (0.16)	0.584	1.73 (1.44)	−0.65 (0.23)	0.005	−0.57 (0.28)	0.045
Analysis of intervention effect among non-compliers only (n=55 control, n=26 intervention)‡
Home safety problem score
Baseline	2.77 (1.84)			2.45 (1.27)
Six-month follow-up	2.45 (1.54)	−0.13 (0.37)	0.721	2.88 (2.59)	0.66 (0.58)	0.260	0.79 (0.69)	0.254
Twelve-month follow-up	2.85 (2.06)	0.17 (0.33)	0.595	2.07 (1.46)	−0.30 (0.46)	0.506	−0.48 (0.56)	0.396

^*The changes over time and the differences in the changes over time between the safety promotion group and the control group and p values were estimated based on the linear mixed models including time, intervention and interactions between time and intervention.

^†Sample-estimated means and SDs.

^‡Compliers are participants who attended ≥1 session; non-compliers are participants who did not attend any sessions; the analysis of intervention effect among compliers/non-compliers included the compliers/non-compliers who had missing values for home safety problems at one or two assessments.