Agreement Between Child Self- and Parent Proxy-Reports of Health-Related Quality of Life in Spinal Muscular Atrophy: Preliminary Insights from a Nationwide Patient Registry in Germany

Erik Landfeldt,1 Berenike Leibrock,2 Justine Hussong,3 Simone Thiele,4 Maggie C Walter,4 Eva Moehler,3 Michael Zemlin,5 Ulrich Dillmann,6 Marina Flotats-Bastardas7 1IQVIA, Stockholm, Sweden; 2Department of Medicine, University of Saarland, Saarbruecken, Germany; 3Department of Child and Adolescent P...

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Main Authors: Landfeldt E, Leibrock B, Hussong J, Thiele S, Walter MC, Moehler E, Zemlin M, Dillmann U, Flotats-Bastardas M
Format: Article
Language:English
Published: Dove Medical Press 2025-06-01
Series:Patient Related Outcome Measures
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Online Access:https://www.dovepress.com/agreement-between-child-self--and-parent-proxy-reports-of-health-relat-peer-reviewed-fulltext-article-PROM
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Summary:Erik Landfeldt,1 Berenike Leibrock,2 Justine Hussong,3 Simone Thiele,4 Maggie C Walter,4 Eva Moehler,3 Michael Zemlin,5 Ulrich Dillmann,6 Marina Flotats-Bastardas7 1IQVIA, Stockholm, Sweden; 2Department of Medicine, University of Saarland, Saarbruecken, Germany; 3Department of Child and Adolescent Psychiatry, Saarland University Hospital, Homburg, Germany; 4Friedrich Baur Institute at the Department of Neurology, LMU University Hospital, LMU Munich, Munich, Germany; 5Department of General Pediatrics and Neonatology, Saarland University Hospital, Homburg, Germany; 6Department of Neurology, Saarland University, Homburg, Germany; 7Department of General Pediatrics and Neonatology, Division of Neuropediatrics, Saarland University, Homburg, GermanyCorrespondence: Marina Flotats-Bastardas, Department of General Pediatrics and Neonatology, Division of Neuropediatrics, Saarland University, Kirrbergerst 100, Homburg, 66421, Germany, Tel +49 68411628352, Email Marina.flotats-bastardas@uks.euObjective: The objective of this pilot study was to examine the agreement between child self- and parent proxy-assessment of health-related quality of life (HRQoL) in spinal muscular atrophy (SMA) in the era of disease-modifying therapy.Methods: Children with SMA and one of their parents were recruited via the German national TREAT-NMD SMA patient registry. HRQoL was measured using the Pediatric Quality of Life Inventory 3.0 Neuromuscular Module (PedsQL 3.0 NMM), KIDSCREEN-27, and the Health Utilities Index (HUI). Agreement between child self- and parent proxy-ratings of ordinal measures was estimated using Cohen’s κ, and for continuous measures using intraclass correlation coefficients (ICCs) from one-way random-effects models.Results: The final sample comprised 17 children with SMA (mean age: 9.88 years, SD: 4.33 years, range: 5– 16 years; 59% female) and one of their parents. All but two patients (88%) were receiving disease-modifying therapy (nusinersen or risdiplam). The ICC for the total PedsQL 3.0 NMM score was estimated at 0.85 (95% CI: 0.64– 0.94, p < 0.001) (indicative of excellent agreement). The corresponding estimate for the KIDSCREEN total score was 0.27 (95% CI: 0.00– 0.75, p = 0.197) (poor/fair agreement) and the global HUI utility 0.98 (95% CI: 0.93 to 0.9952, p < 0.001) (excellent agreement). The lowest levels of concordance were found for school and family life, as well as mental well-being, as opposed to physical functioning and disability.Conclusion: We show that the agreement between child self- and parent proxy-reports of HRQoL in SMA varies markedly across HRQoL measures and examined domains, ranging from poor/fair to excellent. Compared with previous research, agreement for the PedsQL 3.0 NMM was markedly higher in our contemporary cohort of patients treated with novel therapies. These preliminary findings will be helpful in informing the design of future research of HRQoL in SMA.Keywords: HRQoL, PROMs, well-being, proxy, disability, SMA, neuromuscular, utilities
ISSN:1179-271X