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 | Estimated change in mean* | Mean | Estimated change in mean* | |||||
| M (SD)† | M (SE) | p Value | M (SD)† | 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.