Polish Validation and Language Adaptation of the Banff Patellofemoral Instability Instrument 2.0

Area of Science:

• Orthopaedic research
• Clinical assessment tools
• Patient-reported outcome measures (PROMs)

Background:

• Patient-reported outcome measures (PROMs) are increasingly vital in orthopaedics.
• The Banff Patellofemoral Instability Instrument 2.0 (BPII 2.0) is a disease-specific tool for patellofemoral instability.

Purpose of the Study:

• To adapt, translate, and validate the BPII 2.0 into Polish.
• To facilitate the evaluation of Polish-speaking patients with patellofemoral instability.

Main Methods:

• The Polish BPII 2.0 was assessed in 80 patients with recurrent patellofemoral joint (PFJ) instability.
• Psychometric properties including reliability, validity, SEM, and MCID were evaluated using established scales.
• Test-retest reliability and internal consistency were measured using ICC and Cronbach's alpha.

Main Results:

• The Polish BPII 2.0 demonstrated excellent test-retest reliability (0.995) and internal consistency (Cronbach's alpha 0.95-0.96).
• Strong correlations were found between the BPII 2.0 and other PROMs (IKDC, Lysholm, Kujala, NPI).
• The SEM was 1.329 and MCID was 3.028.

Conclusions:

• The Polish version of the BPII 2.0 is a reliable and valid instrument for Polish-speaking patients with recurrent patellofemoral instability.
• This validated tool supports uniform functional assessment in international multicenter studies.