ABSTRACT Purpose This study aimed to translate the T‐14 questionnaire into Swedish and validate it in a Swedish pediatric population with tonsil‐related disease. Methods A prospective validation study was conducted across five Swedish otorhinolaryngology departments from October 2022 to June 2024. Translation followed a standardized forward–backward procedure. Caregivers of patients (< 16 years) scheduled for tonsil surgery completed the Swedish T‐14 and EQ‐5D‐Y VAS (EuroQol five‐Dimensional questionnaire for Youth, Visual Analog Scale VAS) at baseline, 2 weeks later, and 6 months postoperatively. A healthy control group was included for comparison. Psychometric evaluation included known‐groups validity (Mann–Whitney U ), construct validity (confirmatory factor analysis), convergent validity (Spearman's correlation), internal consistency (Cronbach's α ), test–retest reliability (intraclass correlation coefficient), and responsiveness (Wilcoxon signed‐rank, Cohen's d ). Results A total of 249 participants were included (case group 169, control group 80). Known‐groups validity was confirmed, with significantly higher baseline T‐14 scores in the case group ( p < 0.001). Confirmatory factor analysis supported the predefined two‐factor model (comparative fit index = 0.94, Tucker–Lewis index = 0.92, standardized root mean square residual = 0.061), although root mean square error of approximation (0.099) indicated some misfit. Convergent validity was demonstrated by a weak but significant negative correlation with EQ‐5D‐Y VAS ( r s = −0.32; p < 0.001). Internal consistency was good ( α = 0.83), and test–retest reliability showed good stability (ICC = 0.77). Responsiveness was strong, with a large reduction in T‐14 scores 6 months after surgery ( p < 0.001; Cohen's d = 1.89). Conclusion T‐14 demonstrated good validity, reliability, and responsiveness, effectively distinguishing patients from healthy controls. It is suitable for clinical use and enables comparisons with international studies. Level of Evidence Level III—non‐randomized controlled cohort.
Gerhardsson et al. (Wed,) studied this question.