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Rasch analysis of the Patient and Observer Scar Assessment Scale (POSAS) in burn scars
Authors:Martijn B. A. van der Wal  Wim E. Tuinebreijer  Monica C. T. Bloemen  Pauline D. H. M. Verhaegen  Esther Middelkoop  Paul P. M. van Zuijlen
Affiliation:(1) Association of Dutch Burn Centers, Beverwijk, The Netherlands;(2) Burn Center, Red Cross Hospital, Beverwijk, The Netherlands;(3) Department of Plastic, Reconstructive, and Hand Surgery, VU medical Center, Amsterdam, The Netherlands;(4) Department of Plastic, Reconstructive, and Hand Surgery, Academic Medical Center, Amsterdam, The Netherlands;(5) Department of Plastic, Reconstructive, and Hand Surgery, Red Cross Hospital, Beverwijk, The Netherlands;
Abstract:

Purpose  

The Patient and Observer Scar Assessment Scale (POSAS) is a questionnaire that was developed to assess scar quality. It consists of two separate six-item scales (Observer Scale and Patient Scale), both of which are scored on a 10-point rating scale. After many years of experience with this scale in burn scar assessment, it is appropriate to examine its psychometric properties using Rasch analysis.
Keywords:
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