Measurement of physical activity in cancer survivors: a validity study

Purpose The purpose of the study was to validate the Taiwanese version of the Physical Activity Scale for the Elderly (PASE-T) and to assess physical activity in Taiwanese cancer survivors. Methods One hundred twenty-seven cancer survivors participated in this study. Instruments consisted of the PASE-T, the Taiwanese version of the MD Anderson Symptom Inventory (MDASI-T), Karnofsky performance status (KPS), and actigraph. Reliability was assessed by calculating the test–retest reliability. The validity was assessed by the content validity, criterion-related validity, convergent validity, and known-group validity. Results The test–retest reliability of PASE-T was 0.90 over a 2-week interval, based on a sample of 30 patients. The content validity index was very acceptable at 0.91. Convergent validity was demonstrated by its significant association with MDASI-T scores (symptom severity: r = −0.23, p = 0.001; symptom interference: r = −0.21, p = 0.001) and KPS scores ( r = 0.59, p