Background: Patient-reported outcome measures are essential tools for assessing function and quality of life. The Banff Patellofemoral Instability Instrument Version 2.0 (BPII 2.0) is specifically designed to evaluate adolescents and adults experiencing patellofemoral instability (PFI). Purpose: Because no French version was available, this study aimed to translate and validate a Canadian-French (CF) version of the BPII 2.0. Study Design: Cohort study (Diagnosis); Level of evidence, 3. Methods: The BPII 2.0 was translated using a forward-backward translation method (BPII 2.0-CF), following guidelines from the American Association of Orthopaedic Surgeons and the Institute for Work 73%), with a median age of 21 years (range, 14-54). The median symptom duration before consultation was 48 months (range, 0.5-480.0). Mean ± SD BPII 2.0-CF scores were 38.46 ± 14.48 (N = 45), 39.52 ± 15.99 (n = 34), and 60.99 ± 20.24 (n = 29) at baseline, day 7, and 6 months after surgery, respectively. No floor or ceiling effects were observed. The construct validity of the translated BPII 2.0 and the French Kujala score at baseline was fair and statistically significant ( r = 0.56; 95% CI, 0.28-0.77; P < .001). Internal consistency was acceptable with Cronbach alpha coefficient of .87. Retest reliability was good with an ICC of 0.75 (95% CI, 0.56-0.87; P < .001), and the response to change showed strong reactivity with an effect size of 0.79 (95% CI, 0.60-0.90; P < .001). Conclusion: The CF version of the BPII 2.0 is a valid, reliable, and appropriate tool for assessing patients with PFI. The rigorous translation and validation process supports its use in Francophone clinical settings.
Essomba et al. (Sun,) studied this question.