Figure 1.

Study design flowchart and evaluation tools used at each assessment. The number of participants included the data analyses (N) includes values from questionnaires returned by post by nonattendees and last value carried forward for other missing data. OAK: Osteoarthritis of the Knee Self-Management Program; SF-36: Short Form 36 version 1 questionnaire; ROM: range of motion; VAS: Visual Analogue Scale; WOMAC: Western Ontario and McMaster Universities Arthritis Index.