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Cross-cultural adaptation and validation of the Polish version of the Core Outcome Measures Index for low back pain
Authors:Grzegorz Miekisiak  Marta Kollataj  Jan Dobrogowski  Wojciech Kloc  Witold Libionka  Mariusz Banach  Dariusz Latka  Tomasz Sobolewski  Adam Sulewski  Andrzej Nowakowski  Grzegorz Kiwic  Adam Pala  Tomasz Potaczek
Affiliation:1. Department of Neurosurgery, Specialist Medical Center, ul. Jana Pawla II 2, 57-320, Polanica-Zdroj, Poland
2. Department of Pain Research and Treatment, Jagiellonian University, Cracow, Poland
10. Department of Neurology and Neurosurgery, Faculty of Medical Sciences, University of Varmia and Masuria, Olsztyn, Poland
3. Department of Neurosurgery, Pomeranian Traumatology Center, Gdansk, Poland
4. Department of Neurosurgery, Sokolowski Hospital, Wa?brzych, Poland
5. Department of Neurosurgery, Regional Medical Center, Opole, Poland
6. Department of Spinal Surgery, University of Medical Sciences, Poznan, Poland
7. Department of Neurosurgery, Regional Specialist Hospital, Jastrzebie-Zdroj, Poland
8. Spine Department, District Orthopaedic Hospital, Piekary Slaskie, Poland
9. Department of Orthopaedics and Rehabilitation, Jagiellonian University, Zakopane, Poland
Abstract:

Purpose

The Core Outcome Measures Index (COMI) is a short, multidimensional outcome scale validated for the use by patients with spinal disorders. It is a recommended instrument in the Spine Society of Europe Spine Tango Registry. The purpose of this study was to produce a cross-culturally adapted and validated Polish COMI.

Methods

The cross-cultural adaptation was carried out using the established guidelines. One-hundred and sixty-nine patients with chronic low back pain were enrolled, 89 took part in the reproducibility part of the study. Data quality, construct validity and reproducibility were assessed.

Results

The quality of data was very good with very few missing answers and modest floor effect. Reliability expressed as intraclass correlation coefficient (ICC) was 0.90 (95 % CI 0.85–0.93) for the overall COMI score and for most of the individual core items. The minimum detectable change (MDC95%) was 1.79.

Conclusions

The Polish version of COMI showed a favorable reproducibility similar to that of previously tested language versions. The COMI scores correlated sufficiently with existing measures. This version of the COMI is a valuable instrument for the use by Polish-speaking patients with spinal disorders.
Keywords:
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