... The pattern of associations of the two BPI scales with corresponding and non-corresponding scales of the WOMAC and SF-36 largely supported the construct validity of the BPI. The responsiveness ... completed a questionnaire thatcomprised data on gender, age, marital status, cohabita-tion, education level, employment status, type of sur-gery, duration of pain in the joint, and number of yearswith ... and corresponding and non-corresponding scales of the WOMAC and SF-36 lar gely supported the con-struct validity of the BPI. Our hypothesis was fairlycrude and based on the judgment of items...