Evaluating the quality of pain management in a hospital setting: testing the psychometric properties of the Icelandic version of the revised American Pain Society patient outcome questionnaire.

Pain management is an important aspect of providing quality health care, and monitoring patient-related outcomes is a recommended quality improvement practice. Valid and reliable tools are needed for this purpose. The American Pain Society Patient Outcome Questionnaire (APS-POQ) is widely used to measure quality of pain management. The APS-POQ was recently revised to reflect advances in pain management. The purpose of this study was to test the psychometric properties of the revised version in Icelandic patients in the hospital setting. The questionnaire was translated according to an adaptation of Brislin's model. Data were collected from 143 patients on 23 wards in a university hospital. Participants were ≥ 18 years old, hospitalized for >24 hours, alert, not too ill to participate, and in pain ≥ 1 on a 0-10 scale in the past 24 hours. Mean (SD) age was 66 (18) years, 51.4% were women, 48.6% men. Principal component analysis with varimax rotation confirmed a five-component structure, but four items lowered reliability and were removed from the scales. The final version consists of four components, with Cronbach α >.70, explaining 64.2% of the variance. Participants had little difficulty in answering the questionnaire, but two additional items about participation in decisions and pain medications were added in response to patients' comments and suggestions. Administering the Icelandic version of the APS-POQ-R was found to be feasible, and the questionnaire has acceptable construct validity and reliability. The results support the use of the APS-POQ-R-I to evaluate the quality of pain management in hospitals in Iceland.