Polish Adaptation of the Italian Spine Youth Quality of Life Questionnaire

Abstract

The study aimed to carry on the process of the cultural adaptation of the Italian Spine Youth Quality of Life Questionnaire (ISYQOL) into Polish (ISYQOL-PL). The a priori hypothesis was: the ISYQOL-PL questionnaire is reliable and appropriate for adolescents with a spinal deformity. Fifty-six adolescents (mean age 13.8 ± 1.9) with idiopathic scoliosis (AIS) with a mean Cobb angle 29.1 (±9.7) and two with Scheuermann juvenile kyphosis (SJK) with a kyphosis angle 67.5 (±17.7) degrees were enrolled. All patients had been wearing a corrective TLSO brace for an average duration of 2.3 (±1.8) years. The Institutional Review Board approved the study. The cross-cultural adaptation of the ISYQOL-PL was performed following the guidelines set up by the International Quality of Life Assessment Project. The reliability was assessed using internal consistency (the Cronbach’s alpha coefficient) and test–retest reliability (intraclass correlation coefficient ICC2.1, CI = 95%); moreover, floor and ceiling effects were calculated. The internal consistency was satisfactory (Cronbach’s alpha coefficient 0.8). The test–retest revealed high reliability with the value of ICC2.1 for the entire group 0.90, CI (0.84 to 0.94). There was neither floor nor ceiling effect for the ISYQOL-PL overall score. The ISYQOL-PL is reliable and can be used in adolescents with spinal deformity.

The Measurement of Health-Related Quality of Life of Girls with Mild to Moderate Idiopathic Scoliosis—Comparison of ISYQOL versus SRS-22 Questionnaire

“…The questionnaire is developmentally appropriate for ages 10–18 years and is designed to be self-administrated [ 13 , 14 ]. The recently validated Polish language version (ISYQOL-PL) of the ISYQOL questionnaire was used in the study [ 13 , 17 ].…”

“…The Scoliosis Research Society-22 (SRS-22) questionnaire is the most commonly used [ 10 , 11 , 12 ]; however, new tools are being developed. The Italian Spine Youth Quality of Life (ISYQOL) questionnaire, translated and culturally validated into English, Spanish, and Polish (ISYQOL-PL), is the first questionnaire developed using Rasch analysis to measure the HRQoL in spine deformity during growth [ 13 , 14 , 15 , 16 , 17 ]. Rasch analysis is a statistical technique for evaluating questionnaires and developing questionnaires’ ordinal scores into interval measures [ 13 , 14 ].…”

Cross-Cultural Adaptation and Psychometric Properties of the Traditional Chinese Version of the Italian Spine Youth Quality of Life (ISYQOL) Questionnaire

“…Additionally, ISYQOL-TC demonstrated excellent test-retest reliability for both the spine health and brace domains (all ICC values > 0.94) among participants with or without bracing. Canadian-French, Persian, and Polish versions of ISYQOL also showed excellent test-retest reliability (ICC > 0.9) [14,18,26], while the simplified Chinese and Arabic versions displayed moderate test-retest reliability (ICC > 0.7) [17,19].…”

“…Higher percentages indicate better HRQOL. ISYQOL has demonstrated high internal consistency (Cronbach's alpha > 0.80) and testretest reliability (intraclass correlation coefficient, ICC > 0.9) in Canadian-French, Persian, Polish, and simplified Chinese versions for conservatively treated patients [8,14,18,26].…”

“…The original Italian questionnaire has been translated and cross-culturally validated in different languages (e.g., Arabic, Canadian-French, Chinese, English, and simplified Chinese [13,14,[16][17][18][19]). Although the simplified Chinese version has demonstrated good reliability and validity, the perceived meaning of wording by simplified Chinese users differs from traditional Chinese users due to cultural differences [20].…”