École de réadaptation, Université de Montréal, 7077 Av du Parc, Montreal, Quebec, Canada, H3N1×7; Sainte-Justine University Hospital Center, 3175 Chem. de la Côte-Sainte-Catherine, Montreal, Quebec, Canada, H3T1C5.
Department of Physical Therapy, Faculty of Rehabilitation Medicine, University of Alberta, 2-50 Corbett Hall, Edmonton, Alberta, Canada, T6G2G4.
Spine J. 2022 Nov;22(11):1893-1902. doi: 10.1016/j.spinee.2022.07.094. Epub 2022 Jul 20.
Idiopathic scoliosis (IS) can significantly alter the quality of life of adolescents. Some of the available questionnaires in French measuring the quality of life in this population show weak psychometric properties. The newly developed Italian Spine Youth Quality of Life (ISYQOL) questionnaire promises better properties.
To provide a French-Canadian version of the ISYQOL and to verify its psychometric characteristics.
Prospective validation of a cross-cultural adaptation of the ISYQOL questionnaire.
A total of 111 participants with idiopathic scoliosis (77.5% female, 10-18 years old, mean Cobb angle=28°) were included in the study.
The French-Canadian version of the Italian Spine Youth Quality of Life (ISYQOL-F) questionnaire.
The ISYQOL was translated into French using a forward-backward approach. We then verified the understanding of the translated items with two scoliosis experts and 10 adolescents. Afterward, 111 adolescents with IS were recruited by convenience at the scoliosis clinic and they completed the ISYQOL on three occasions (before seeing the specialist, 1 week, and 2 weeks after). Cronbach's alpha, intra-class (ICC), and Pearson correlation coefficients were used to respectively determine internal consistency, test-retest reliability, and concurrent validity with the SRS-22r and SF-12. The standard error of measurement (SEM) and 95% confidence minimal detectable change (MDC) were also calculated. The ceiling effect was quantified as the percentage of participants who scored the maximum on ISYQOL-F.
The ISYQOL-F showed good internal consistency with a Cronbach alpha of 0.81 and 0.85 respectively for items 1-13 (n=55; ISYQOL-F mean score ± SD = 63.9±13.5) and 1-20 (n=56; ISYQOL-F mean score ± SD=60.7±10.3). Test-retest reliability was excellent (ICC=0.94). The SEM is 3.1 and the MDC is 8.6. Correlations between ISYQOL-F and SRS-22r and between ISYQOL-F and SF-12 were moderate for total scores (r=0.56 and 0.50 respectively, p<.001), but low for each domain (between 0.20 and 0.48, p<.05). No significant ceiling effects were observed for ISYQOL-F (≤2.5%). In contrast, ceiling effects ranged from 3.6% to 30.6% for SRS-22r and 0%-68.5% for SF-12.
The internal consistency and reliability of ISYQOL-F are good. The total score correlates moderately with the SRS-22r and SF-12. Unlike SRS-22r, the ISYQOL-F does not appear to have a ceiling effect. The ISYQOL-F may thus be suitable to assess quality of life in a population of French-Canadian adolescents with IS.
特发性脊柱侧凸（IS）会显著改变青少年的生活质量。一些现有的用于评估该人群生活质量的法语问卷在心理测量学特性上表现不佳。新开发的意大利脊柱青年生活质量问卷（ISYQOL）有望具有更好的特性。
提供法语加拿大版的 ISYQOL 并验证其心理测量学特性。
ISYQOL 问卷跨文化适应性的前瞻性验证。
共纳入 111 名特发性脊柱侧凸患者（77.5%为女性，10-18 岁，平均 Cobb 角=28°）。
ISYQOL-F 具有良好的内部一致性，13 项（n=55；ISYQOL-F 平均得分±标准差=63.9±13.5）和 20 项（n=56；ISYQOL-F 平均得分±标准差=60.7±10.3）的 Cronbach α分别为 0.81 和 0.85。测试-重测信度极好（ICC=0.94）。SEM 为 3.1，MDC 为 8.6。ISYQOL-F 总分与 SRS-22r 和 SF-12 之间的相关性为中度（分别为 r=0.56 和 0.50，p<.001），但各领域的相关性较低（0.20-0.48，p<.05）。ISYQOL-F 没有明显的天花板效应（≤2.5%）。相比之下，SRS-22r 的天花板效应范围为 3.6%-30.6%，SF-12 的天花板效应范围为 0%-68.5%。
ISYQOL-F 的内部一致性和可靠性良好。总分与 SRS-22r 和 SF-12 中度相关。与 SRS-22r 不同，ISYQOL-F 似乎没有天花板效应。因此，ISYQOL-F 可能适合评估法语加拿大青少年特发性脊柱侧凸患者的生活质量。
