摘要：Objectives. We investigated the effect of family social and economic circumstances on intentional injury among adolescents. Methods. We conducted a cross-sectional register study of youths aged 10 to 19 years who lived in Sweden between 1990 and 1994. We used socioeconomic status, number of parents in the household (1- or 2-parent home), receipt of welfare benefits, parental country of birth, and population density as exposures and compiled relative risks and population-attributable risks (PARs) for self-inflicted and interpersonal violence–related injury. Results. For both genders and for both injury types, receipt of welfare benefits showed the largest crude and net relative risks and the highest PARs. The socioeconomic status–related PAR for self-inflicted injury and the PAR related to number of parents in the household for interpersonal violence–related injury also were high. Conclusions. Intentional-injury prevention and victim treatment need to be tailored to household social circumstances. The contribution of intentional injury to the overall burden of trauma, mortality, and morbidity increases substantially during adolescence. In Sweden, for example, the incidence of self-inflicted injury among girls aged 15–19 years is close to that of traffic-related injury. 1 Additionally, strong inverse relationships have been found between household (parental) socioeconomic status (SES) and injury risk among adolescents 2– 10 —in particular, interpersonal violence–related injury 2, 3, 10 and self-inflicted injury. 4, 6 Apart from household SES, few household social and economic characteristics have been documented in relation to intentional injuries during adolescence. However, it seems that living in a single-parent home 11– 13 and being in a family that receives welfare benefits 14 both have an impact on risk level. By contrast, the effect of parental country of birth is unclear. 3 Furthermore, population density has been found to be associated with injury caused by interpersonal violence among young people. 15 The fact that studies have not commonly considered several family-related social characteristics simultaneously limits our understanding of the true effect of any particular family social circumstance on injury risk during adolescence. 2 A recent Swedish national study revealed that among adolescents, the combination of living in a single-parent home, receiving welfare benefits, and not having a parent born in Sweden reduces the association of household SES with risk of intentional injury but not with risk of traffic-related injury. 1 Yet, the manner in which these characteristics operate separately and in association with one another remains unclear. Our study investigated this question more closely. We considered family-related social attributes in conjunction with population density, and we measured the individual and the combined effects of these factors on risk of self-inflicted and interpersonal violence–related injury among Swedish adolescents.
