Validity and Reliability of the Spanish Version of Godin-Shephard Leisure-Time Physical Activity Questionnaire in Prostate Cancer Patients

Abstract

Background: Prostate cancer is highly prevalent in Spanish men. Although physical activity has benefits on several factors in prostate cancer survivors, this is diminished after medical oncology treatment. Cancer-related fatigue is one of the main barriers to physical activity, leading to a decrease in activity levels in these patients. Therefore, it is essential to assess physical activity in an efficient and simple way in order to design rehabilitation programmes for this population. Objective: The aim was to translate and adapt the Godin–Shephard Leisure-Time Physical Activity Questionnaire (GSLTPAQ) for Spanish-speaking prostate cancer patients and to assess its validity and reliability using the International Physical Activity Questionnaire (IPAQ) as a reference standard. Methods: Following Beaton’s guidelines, the GSLTPAQ was back-translated and cross-culturally adapted. Validity and reliability were assessed with a sample of thirty prostate cancer patients. Internal consistency and test-retest variability were also evaluated. Results: The Spanish GSLTPAQ demonstrated excellent validity, with high correlations with the IPAQ for light (r = 0.924), moderate (r = 0.931), and vigorous activities (r = 0.882). Internal consistency was strong (Cronbach’s alpha: 0.845–0.950). Test-retest reliability showed strong intraclass correlation coefficients (ICCs) for all activity levels, indicating good reliability. Conclusions: The Spanish version of the GSLTPAQ is a valid and reliable tool for assessing physical activity in prostate cancer patients. It shows strong correlations with the IPAQ, excellent internal consistency, and test-retest reliability.