<qa>  What was the WOMAC function subscale?WOMAC Function and Pain. Self-reported function was assessed by the WOMAC function subscale, a 17-item Likert scale questionnaire 0none, 1mild, 2moderate, 3severe, 4extreme and pain was assessed by the WOMAC pain subscale, a 5-item Likert scale questionnaire 0none, 1mild, 2moderate, 3severe, 4extreme. Self-reported function was represented by summation of the component item scores range: 0-68; higher scores indicate greater functional loss and pain was represented by summation of the component item scores range: 0-20; higher scores indicating greater levels of pain. 