Journal of patient-reported outcomes · 2026
Development and pilot testing of the quality of life of parents of children with achondroplasia questionnaire.
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Adedeji Adekunle, Witt Stefanie, Salomão Maria, Steinhoff Tabea, Innig Florian, Alves Inês, Provasi Chiara, Sessa Marco, Mohnike Klaus, Quitmann Julia
Аннотация
BACKGROUND: Parents of children with achondroplasia face sustained caregiving demands that may affect multiple dimensions of well-being. Despite growing recognition of these challenges, no validated, condition-specific instrument exists to assess the quality of life (QoL) of parents of children with achondroplasia. This study aimed to develop, and pilot test the Quality of Life of Parents of Children with Achondroplasia (QOLA) questionnaire.
METHODS: QOLA was developed using a multi-phase mixed-methods design in accordance with established standards for developing self-reported outcome measures for caregivers and parents. Phase 1 comprised semi-structured qualitative interviews with 17 parents of children with achondroplasia to identify relevant QoL domains and language. Interview data were analysed using qualitative content analysis and informed systematic item generation (Phase 2). Conceptual structure was examined through researcher-led card sorting (Phase 3) and two rounds of international card sorting following translation (Phase 4). The resulting 63-item questionnaire across eight domains was pilot-tested in a cross-sectional, multi-country study with embedded cognitive debriefing in Germany, Italy, and Portugal (total N = 50).
RESULTS: The final pilot version of QOLA comprised 63 items across eight domains covering healthcare experiences, challenges and support, physical health, mental health, social life and relationships, coping, family and daily life, and worries and future concerns. Item-level missing data were minimal, and no pronounced floor or ceiling effects were observed. Internal consistency was acceptable to good for domains (α = 0.624-0.821) and good for the total scale (α = 0.798). Inter-domain correlations were generally moderate to strong. Cognitive debriefing was highly acceptable and relevant across countries, with some suggestions for further refinement.
CONCLUSIONS: QOLA shows strong preliminary evidence of acceptability and internal consistency and addresses a key measurement gap in achondroplasia research. Further large-scale psychometric validation is warranted.
METHODS: QOLA was developed using a multi-phase mixed-methods design in accordance with established standards for developing self-reported outcome measures for caregivers and parents. Phase 1 comprised semi-structured qualitative interviews with 17 parents of children with achondroplasia to identify relevant QoL domains and language. Interview data were analysed using qualitative content analysis and informed systematic item generation (Phase 2). Conceptual structure was examined through researcher-led card sorting (Phase 3) and two rounds of international card sorting following translation (Phase 4). The resulting 63-item questionnaire across eight domains was pilot-tested in a cross-sectional, multi-country study with embedded cognitive debriefing in Germany, Italy, and Portugal (total N = 50).
RESULTS: The final pilot version of QOLA comprised 63 items across eight domains covering healthcare experiences, challenges and support, physical health, mental health, social life and relationships, coping, family and daily life, and worries and future concerns. Item-level missing data were minimal, and no pronounced floor or ceiling effects were observed. Internal consistency was acceptable to good for domains (α = 0.624-0.821) and good for the total scale (α = 0.798). Inter-domain correlations were generally moderate to strong. Cognitive debriefing was highly acceptable and relevant across countries, with some suggestions for further refinement.
CONCLUSIONS: QOLA shows strong preliminary evidence of acceptability and internal consistency and addresses a key measurement gap in achondroplasia research. Further large-scale psychometric validation is warranted.