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Childhood cancer is a traumatic experience for survivors and their families. The experience of this disease affects survivors' and families' quality of life, even years after it occurs. The purpose of the present study was to assess if the caregivers' posttraumatic stress symptoms mediated the associations between survivors' posttraumatic stress symptoms and caregivers' quality of life, in a sample of 46 dyads of caregivers and childhood cancer survivors. Survivors and caregivers completed the PCL-5, and caregivers completed the WHOQOL-bref. Results showed that survivors' and caregivers' posttraumatic stress symptoms scores and caregivers' quality of life were associated. The caregivers' posttraumatic stress symptoms mediated the relationship between survivors' posttraumatic stress symptoms and caregivers' quality of life. Knowing posttraumatic stress symptoms direct and indirect effects on caregivers' quality of life contributes to understand their experience and to develop intervention strategies with this population.

Introduction. The KIDSCREEN and DISABKIDS questionnaires constitute a modular system for assessing the health-related quality of life (HrQoL) of children/adolescents. Objective: This study was aimed at examining the factorial structure of the Portuguese patient- and parent-reported versions of the DISABKIDS-Asthma Module (AsM) and its invariance across age groups and informants, as well as to examine their reliability and construct validity. Method. The sample included 140 children/adolescents aged 8-18 years, who were diagnosed with asthma, and one of their parents. Both family members assessed HrQoL at the generic (KIDSCREEN-10), chronic-generic (DISABKIDS-12) and asthma-specific (DISABKIDS-AsM) levels. Asthma severity was classified by physicians using Global Initiative for Asthma (GINA) guidelines. Results. Confirmatory factor analysis attested the factorial validity of the correlated two-factor model of the DISABKIDS-AsM, but the low average variance extracted by each factor (Impact and Worry) suggested that a one-factor structure would better fit the Portuguese data. The one-factor model had an acceptable fit (χ2/df = 1.97; comparative fit index = 0.94; root mean square error of approximation = 0.08) and was invariant between age groups (children vs. adolescents) and informants (patient-reports vs. parent-reports). The resulting global index of asthma-specific HrQoL presented good reliability and convergent validity with the generic and chronic-generic measures. The DISABKIDS instruments also detected significant differences in HrQoL regarding asthma severity groups. Conclusion. The DISABKIDS-AsM may be regarded as a specific one-dimensional questionnaire, which, besides suiting pediatric patients in different developmental stages and enabling reliable proxy-reports, is sensitive to asthma clinical characteristics and is cross-culturally comparable, thus representing a valuable tool for assessing asthma-specific HrQoL as a primary health outcome in clinical practice and research contexts. This study was supported by the R&D Unit Institute of Cognitive Psychology, Vocational and Social Development of the University of Coimbra (PEst-OE/PSI/UI0192/2011) and by the Portuguese Foundation for Science and Technology (PhD Grant SFRH/BD/69885/2010).