Reliability and validity of Chinese version of Symptom Intrusiveness Rating Scale among patients experiencing pain associated with chronic wound

Abstract

Objective To translate the Symptom Intrusiveness Rating Scale and test its reliability and validity. Methods The scale was modified based on translation, back-translation and cross-culture adaptation. Ninety-five patients were recruited from wound & stoma clinic of one upper first-class hospital. the questionnaire were tested by internal reliability and test-retest for reliability and exploratory factor analysis and confirmatory factor analysis for validity. Results The coefficient of Cronbach α was 0.823 and the retest reliability was 0.893. The content validity index was 0.871. Three factors, which were F1: functional status, F2: social relations, F1: mental health, were extracted by exploratory factor analysis and they could explain 78.53% of total variance. Confirmatory factor analysis indicated a good model and fit indices c2/df=1.061, GFI=0.903, RMSEA=0.065, NFI=0.932, IFI=0.996. The Chinese version of SyIRS was moderately related with SF-36v2 physical subscales (r=-0.42, P<0.01), and mental subscales (r=-0.45, P<0.01). Conclusions The Chinese version of Symptom Intrusiveness Rating Scale is a reliable and valid instrument, which is applicable to assess the patient’s quality of life associated with chronic wound related pain. Key words: Quality of life; Chronic wound; Pain; Intrusiveness