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This study examined the risk factors for mental health problems and complicated grief in bereaved families using a nationwide sample of 453 Japanese adults who had lost a family member to a motor vehicle accident within three years. The results indicate that 31.0% of participants had K6 scores > 13 and 61.0% had ICG (Inventory of Complicated Grief) scores > 26. A higher K6 score was associated with secondary victimization and support seeking, whereas a higher ICG score was associated with the death of a child. Dispute over the liability for the accident and the resulting anxiety, measured by the Japanese version of ECR (Experiences in Close Relationships), were common predictors of higher K6 and ICG scores. The results suggest that complicated grief is more dependent on the circumstances of the death, whereas mental health problems are more affected by a participant’s coping after the death, implying that effective support and interventions are necessary for mental health problems and complicated grief after a violent death.

The purpose of this study was twofold: first, to create an index for a behavioral linkage analysis of serial sex crimes, and second, to construct a predictive model for the analysis. Data on 720 sex crimes (rape, indecent assault) committed by 360 offenders arrested between 1993 and 2005 throughout Japan were collected. The following seven behaviors were examined during a series of analyses aimed at illustrating the effectiveness of crime linkage in serial sex crimes: victim age group, area type, publicness of offense site, weapon, time, contact method, and day of the week. The results indicated that six of the seven behaviors (excluding "day of the week") significantly distinguished between linked and unlinked crime pairs. Under a logistic regression of these six variables, which were dichotomously coded in terms of the concordance or discordance between each pair of incidents, the area under the receiver operating characteristic (ROC) curve was 0.85 (95% CI = 0.82-0.87), indicating a high level of discriminative accuracy in identifying disparate sex crimes committed by the same person.