However, no real OA quality of life questionnaire has been yet developed. OA can be built as the combination of the SF-36 and a disease specific module; Ware, J.E., Snow. KK, Kosinski, M. and Gandek, B. (1993). SF-36 Health Survey. Manual & Interpretation Guide. Boston: The Health Institute.SF-36 Health Survey: Manual and Interpretation Daily index 5 Guide. The Health Institute, New England Medical Centre, Boston, MA.) and DASS-21 (Lovibond and