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

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

  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
  1. Note: All analyses were performed with missing values imputed by multiple imputation method
  2. 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)