4.5 Article

A comparison between measurement properties of four shoulder-related outcome measures in Nepalese patients with shoulder pain

Journal

QUALITY OF LIFE RESEARCH
Volume 31, Issue 6, Pages 1897-1906

Publisher

SPRINGER
DOI: 10.1007/s11136-022-03080-8

Keywords

DASH; Quick-DASH; SPADI; PSFS; Measurement properties; Shoulder

Funding

  1. CAUL

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The study validates the Nepali PSFS as a reliable, valid, and responsive instrument for shoulder functional assessment in patients with shoulder pain. The study compares the measurement properties and patient preferences of four assessment instruments. The results demonstrate that the PSFS has good reliability and responsiveness compared to the other instruments, and patients prefer the verbal rating scale of the DASH/Quick-DASH. The study recommends the combined use of Quick-DASH or SPADI with PSFS for a comprehensive assessment of Nepali shoulder pain patients in clinical and research settings.
Purpose The Patient-Specific Functional Scale (PSFS), Disability of the Arm, Shoulder and Hand (DASH), Quick-DASH, and Shoulder Pain and Disability Index (SPADI) are frequently used instruments in shoulder functional assessment. They are available in Nepali and all but the PSFS has been validated for shoulder assessment. Therefore, the aim of this study was to validate the Nepali PSFS in shoulder pain patients and to compare validity, reliability, and responsiveness of all four instruments to provide a recommendation for their use. Method Patients attending physiotherapy completed the Nepali PSFS at baseline and follow-up (1-3 weeks). It was tested for reliability using internal consistency (Cronbach's alpha), intraclass correlation coefficient (ICC), construct validity by hypothesis testing and responsiveness by anchor-based method using Area Under the Curve (AUC). The instruments were compared based on reported measurement properties and patients' preference. Results 156 patients enrolled at baseline and 121 at follow-up. The PSFS showed sufficient reliability (alpha = 0.70, ICC = 0.82), construct validity (all three hypotheses met) and responsiveness (AUC = 0.83). Measurement property comparison demonstrated adequate reliability and validity, while PSFS was the most responsive instrument. Patients favoured the verbal rating scale of the DASH/Quick-DASH. The DASH had a lower completion rate for 'culturally sensitive' and 'uncommon' activities. Conclusion The Nepali PSFS is a reliable, valid, and responsive instrument in shoulder functional assessment. The combined use of the Quick-DASH or SPADI with the PSFS is recommended for a comprehensive assessment of Nepali shoulder pain patients in clinical and research settings. They are shorter, more appropriate to the Nepali context and provide balanced self-evaluation.

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