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Impact of patient characteristics on the Canadian Patient Experiences Survey–Inpatient Care: survey analysis from an academic tertiary care centre
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  • Published on:
    Adjusting Hospital Scores to Account for Differences in Patient Characteristics
    • Layla Parast, Statistician RAND Corporation
    • Other Contributors:
      • Marc Elliott, Statistician

    We read with interest the recent article by Rubens et al. “Impact of Patient Characteristics on the Canadian Patient Experiences Survey–Inpatient Care: Survey Analysis from an Academic Tertiary Care Centre.” This work adds to the literature by examining patient characteristics associated with response patterns on the Canadian Patient Experience Inpatient Care Survey. The authors conclude that caution is needed when comparing performance between different entities assessed by this survey, as observed differences could be explained by variation in patient mix rather than variation in performance. While we agree that patient characteristics are likely to explain some of the variation in observed patient experience scores, as has been found in similar settings in the US and UK (Elliott et al. 2009, Paddison et al. 2012), we do not believe that this is problematic for the validity of patient experience scores. Following the common practice of adjusting entity scores for patient characteristics such as self-reported health, education, and age allows for valid comparisons as if all hospitals had treated the same patient population. In practice, one typically adjusts for the average within-hospital difference associated with patient characteristics not under the control of the hospital via a linear regression mode with hospital intercepts.

    In the US inpatient setting, for example, Elliott et al. 2009 showed that self-reported health status had the greatest explanatory pow...

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    Conflict of Interest:
    None declared.