Cumulative risk effect of household dysfunction for child maltreatment after intensive intervention of the child protection system in Japan: a longitudinal analysis

Table 5 Multivariate Cox regression for maltreatment report after temporary custody cancelation

	HR	95% CI	Wald test p
Household dysfunction(HD) and MTM score model
Covariate
Age	0.93	[0.87, 0.98]	0.009
Post-temporary custody service
In-home	1.00	[ref.]
Out-of-home	0.21	[0.11, 0.39]	< .001
Independent variable
HD score
0	1.00	[ref.]
1	1.22	[0.62, 2.40]	0.571
2	1.96	[1.03, 3.73]	0.041
3	2.35	[1.07, 5.16]	0.034
MTM score
0–1	1.00	[ref.]
2	2.12	[0.96, 3.73]	0.064
3	4.82	[2.34, 9.91]	< .001
Composite model
Covariate
Age	0.93	[0.88, 0.99]	0.019
Amount of prior CPS involvement	0.95	[0.85, 1.04]	0.27
Duration of temporary custody	1.00	[0.99, 1.00]	0.376
Post-temporary custody service
In-home	1.00	[ref.]
Out-of-home	0.24	[0.13, 0.47]	< .001
Independent variable
HD score + MTM score
0–1	1.00	[ref.]
2	2.00	[0.50, 8.01]	0.327
3–4	5.00	[1.53, 16.37]	0.008
5–6	11.41	[3.47, 37.52]	< .001

Note: All analyses were performed with missing values imputed by multiple imputation method
HR hazard ratio, CI confidence interval, HD household dysfunction (sum of each of the three individual categories of interparental violence, parental substance abuse, and mental health problem), MTM multi-type maltreatment (number of types of maltreatment, i.e., physical abuse, emotional abuse, and neglect)

ISSN: 1347-4715