Abstract
The European Quality of Life in Short Stature Youth (QoLISSY) questionnaire is a disease-specific instrument assessing quality of life (QoL) in children with short stature from the child and parent perspectives. In order to use the QoLISSY in Dutch samples, a translation process and psychometric testing is needed. Children diagnosed with short stature (8 to 18 years) and their parents were recruited from a Dutch growth clinic. Reliability was assessed using Cronbach’s α and intraclass correlation coefficients (ICCs). Pearsons’ correlations with the generic KIDSCREEN and a confirmatory factor analysis (CFA) were performed to test validity. Scales showed good internal consistency with α ranging from 0.80 to 0.94 (child report) and from 0.85 to 0.95 (parent report). Test–retest reliability (ICC) ranged from 0.15 to 0.91 (child report) and from 0.14 to 0.83 (parent report). Correlations with the KIDSCREEN in the mean range indicated criterion validity. The models’ goodness of fit was confirmed by CFA results in the Dutch and in comparison with the European sample.
Conclusion: The Dutch QoLISSY is a psychometrically reliable and valid short stature-specific QoL measure. It is now available for use in clinical research and practice to evaluate well-being and possible effects of growth hormone treatment and psychological interventions in the Netherlands.
What is Known: • Questions in terms of the efficacy and effectiveness of psychological versus pharmacological interventions alone or in combination can be answered with a disease-specific questionnaire as a self-reported outcome measure. • There is a lack of internationally available short stature-specific QoL instruments reflecting the child and parent perspectives. |
What is New: • The Dutch QoLISSY questionnaire is a psychometrically sound short stature-specific QoL measure reflecting the child and parent perspectives. • The Dutch QoLISSY questionnaire can be used as a treatment outcome indicator in research and practice. |
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Abbreviations
- CFA:
-
Confirmatory factor analysis
- GHD:
-
Growth hormone deficiency
- GH-T:
-
Growth hormone therapy
- ICC:
-
Intraclass correlation coefficient
- ISS:
-
Idiopathic short stature
- QoL:
-
Quality of life
- QoLISSY:
-
Quality of Life in Short Stature Youth
- SDS:
-
Standard deviation scores
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AR designed the study with JQ, organized the data management, performed the statistical analysis, interpreted the results, and wrote the draft manuscript. SS conducted the study, collected data, and participated in instrument translation, and in drafting the manuscript. GK provided patient access and clinical data, supervised data collection, reviewed translations, and revised the manuscript. MB revised the manuscripts, supervised study design, and conducted statistical analysis and interpretation of results. JQ participated in designing and managing the study, supervised data collection, and revised the manuscript.
All authors read and approved the final submitted manuscript.
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Communicated by Jaan Toelen
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Rohenkohl, A., Stalman, S., Kamp, G. et al. Psychometric performance of the Quality of Life in Short Stature Youth (QoLISSY) questionnaire in the Netherlands. Eur J Pediatr 175, 347–354 (2016). https://doi.org/10.1007/s00431-015-2656-8
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DOI: https://doi.org/10.1007/s00431-015-2656-8