Adaptation of the Banff Patellofemoral Instability Instrument (BPII) 2.0 into Swedish

Abstract

Background and purpose: The Banff Patellofemoral Instability Instrument (BPII) 2.0 is a patient-reported outcome measure (PROM) designed specifically for patellofemoral instability. We translated and adapted the BPII 2.0 into Swedish and assessed its psychometric properties.Patients and methods: The BPII 2.0 was forward- and back-translated. Children aged 10–16 years with patellar dislocation and instability or recurrent dislocation were recruited. Children completed the Swedish BPII 2.0 and KOOS-Child during their initial visit (t0) and 1 week later (t1). Internal consistency and test–retest reliability were evaluated using intraclass correlation coefficients (ICCs) for the BPII 2.0 and KOOS-Child scores comparison. Pearson correlation coefficients examined concurrent validity of the Swedish BPII 2.0 subscales with KOOS-Child subscales.Results: 64 children (46 females), mean age 13.8 (10.0–16.3) years, participated. Time after patellar dislocation or surgery was 3–24 months. 55 patients (86%) returned the second BPII 2.0 and KOOS-Child after an average of 9 (5–22) days. There were no ceiling or floor effects for the total score of the new Swedish BPII 2.0 or for its subscales. BPII 2.0 demonstrated excellent internal consistency at t0 (ICC 0.96, 95% confidence interval [CI] 0.95–0.97) and at t1 (ICC 0.97, CI 0.95–0.98), as well as excellent test–retest reliability (ICC 0.97, CI 0.96–0.98). Concurrent validity of the BPII 2.0 subscales with KOOS-Child subscales was moderate to strong (rho 0.40–0.88).Conclusion: The Swedish BPII 2.0 showed excellent internal consistency as well as excellent test–retest reliability and is a reliable and valid questionnaire.

Translation, reliability and validity of the Turkish versions of Norwich Patellar Instability score and The Banff Patellar Instability Instrument 2.0

“…In the original studies, Banff Cronbach's alpha value was 0.91 for BPII 2.0 and 0.93 for NPI, comparable to our study's values [ 16 , 18 ]. In the translation and reliability studies conducted for BPII 2.0 in other languages, these values were found to be 0.93 and 0.95 for the German version, 0.967 for the Dutch version, 0.97 for the Indonesian version, 0.97 for the Swedish version and 0.95 for the Norwegian version [ 19 , 21 – 24 ]. Dutch translation of NPI had Cronbach's alpha value of 0.972 [ 21 ].…”

“…For BPII 2.0, ICC values ranged from 0.89 and 0.98 in the Indonesian translation, 0.89 in the German translation, 0.97 in the Swedish translation, 0.87 in the Norwegian translation and 0.97 in the original study. [ 9 , 18 , 22 – 24 ]. The fact that there are 7–10 days between the two questionnaires and that there is no change in the knee conditions of the patients in this interval may indicate the accuracy of the high value obtained by the literature.…”

“…All of the questions have equal weight, and calculation is made by taking the average point of all answered questions, and a higher score means the patient has a better quality of life. BPII version 2.0 is translated and culturally adapted to German, Brazilian Portuguese, Dutch, Indonesian, Norwegian and Swedish [ 19 – 24 ].…”