Background: Working alliance is the interaction between the patient and therapist. It is a crucial part of the physiotherapeutic process. One instrument to measure working alliance is available in Dutch/Flemish language and validated in psychotherapy setting. Objective: This study aims to validate the Working Alliance Inventory Short-Form in a Dutch physiotherapy setting. Design: A prospective cohort study in primary-care physiotherapy. Method: To validate the Dutch/Flemish version of the working alliance inventory short-form (WAV-12) a RASCH analysis was used. Results: Sixty-six physiotherapists enrolled in total 389 patients with an average age of 50 years and a mean duration of shoulder pain of 33 weeks. A total of 274 patients filled in one or more items of the WAV-12. The WAV-12 showes good discriminative abilities and all items contributed to a one-dimensional construct. Due to the selective nature of the missing items, we believed rewording was necessary to make it more suitable to the physiotherapy setting. We performed a Delphi study and revised the WAV-12 into the PAS (Physio Alliance Scale). The validity of the revised version is unknown and is therefore not sufficiently strong to be implemented as a measurement tool. Limitations: The response rate for three items especially was low and we found ceiling effects in ten items. Conclusion: Although the measurement instrument shows good internal consistency and reliability, we made adjustments to the WAV-12 for Dutch physiotherapy setting.

Additional Metadata
Keywords physician-patient relations, physiotherapy, rasch analysis, therapeutic alliance, WAV-12, Working alliance
Persistent URL dx.doi.org/10.1080/09593985.2017.1400141, hdl.handle.net/1765/102918
Journal Physiotherapy Theory and Practice
Citation
Karel, Y.H.J.M, Thoomes-De Graaf, M, Scholten-Peeters, G.G.M, Ferreira, P.H, Rizopoulos, D, Koes, B.W, & Verhagen, A.P. (2017). Validity of the Flemish working alliance inventory in a Dutch physiotherapy setting in patients with shoulder pain. Physiotherapy Theory and Practice, 1–9. doi:10.1080/09593985.2017.1400141