Abstract
This study aimed to translate and adapt the Intermittent and Constant Osteoarthritis Pain questionnaire into the Arabic language and evaluate the validity and reliability of this scale for participants with knee or hip osteoarthritis. This questionnaire was translated based on the Manufacturers Alliance for Productivity and Innovation protocol. The test-retest reliability was calculated using the Intraclass Correlation Coefficient. Then, Cronbach's alpha was used to assess the internal consistency of Intermittent and Constant Osteoarthritis Pain questionnaire. After that, the criterion validity was evaluated against the Knee injury and Osteoarthritis Outcome Score. A total of 90 participants were included in this study, of which 29 participants were re-evaluated for reliability testing. The Intraclass Correlation Coefficient of the Knee Intermittent and Constant Osteoarthritis Pain questionnaire were 0.841, 0.923 and 0.911 for the total, constant, and intermittent knee pain, respectively. Cronbach's alpha was 0.88, 0.93 and 0.94 for the total score, the intermittent knee pain and the constant knee pain, respectively. Eventually, criterion validity was r=0.24(P<0.05). Intermittent and Constant Osteoarthritis Pain in Arabic is a valid and reliable instrument to be used in Arabic-speaking patients with knee/hip osteoarthritis.