Reliability and Validity of the Chinese Version of the Revised American Pain Society Patient Outcome Questionnaire in Postoperative Patients

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Abstract

The American Pain Society Patient Outcome Questionnaire and the subsequent revised version are the most frequently reported measures of the quality of pain management. However, the reliability and validity of the revised questionnaire have not been reported in Chinese patients. This study sought to evaluate the psychometric properties of the Chinese version of the revised questionnaire in postoperative patients in China. The study was a descriptive, cross-sectional psychometric study. The revised questionnaire was translated into Chinese according to international guidelines and then administered to participants. The patients' present, average, and worst pain intensity were evaluated in face-to-face interviews. The Pain Management Index was calculated according to the worst pain intensity and the classification of analgesic drugs used by the patients. The continuous items in the revised questionnaire demonstrated excellent construct validity and acceptable internal consistency reliability (0.732). Cronbach's alpha coefficients for the following subscales were acceptable: pain severity and sleep interference (0.773), activity interference (0.812), affective (0.824), and adverse effects (0.636); the exception was for the perception of pain care subscale (0.492). Patients with different anticipated pain management outcomes were differentiated as expected. Satisfaction could be predicted (31.3% of the variance) using subscales and items in the questionnaire. Although our evidence supports the psychometric properties of the Chinese version of the revised questionnaire when tested with postoperative patients, further study is needed, especially on the subscale perception of pain care.

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