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

Area of Science:

• Orthopedics
• Pediatric Sports Medicine
• Rehabilitation Science

Background:

• Patellofemoral instability is a common condition in children and adolescents.
• Patient-reported outcome measures (PROMs) are crucial for assessing treatment effectiveness.
• The Banff Patellofemoral Instability Instrument (BPII) 2.0 is a PROM specifically designed for patellofemoral instability.

Purpose of the Study:

• To translate and culturally adapt the BPII 2.0 into Swedish.
• To evaluate the psychometric properties of the Swedish version of the BPII 2.0 in a pediatric population.

Main Methods:

• Forward and backward translation of the BPII 2.0.
• Recruitment of children (10-16 years) with patellar dislocation or instability.
• Assessment of internal consistency and test-retest reliability using intraclass correlation coefficients (ICCs).
• Evaluation of concurrent validity against the KOOS-Child using Pearson correlation coefficients.

Main Results:

• 64 children participated, with 55 completing the study measures twice.
• The Swedish BPII 2.0 demonstrated excellent internal consistency (ICC 0.96-0.97) and test-retest reliability (ICC 0.97).
• No ceiling or floor effects were observed.
• Concurrent validity with KOOS-Child subscales was moderate to strong (rho 0.40-0.88).

Conclusions:

• The Swedish BPII 2.0 is a reliable and valid PROM for assessing patellofemoral instability in pediatric patients.
• The instrument exhibits excellent psychometric properties, including internal consistency and test-retest reliability.
• This validated Swedish version facilitates better patient-centered care for pediatric patellofemoral instability.