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Table 1 Timing of the outcome assessment

From: Effectiveness of prolonged use of continuous passive motion (CPM) as an adjunct to physiotherapy following total knee arthroplasty: Design of a randomised controlled trial [ISRCTN85759656]

  T0 Pre-operative T1 Clinical phase T2 17 days after surgery T3 6 weeks after surgery T4 12 weeks after surgery
Range of motion X X X X X
Knee Society Score X X X X X
WOMAC X   X X X
Perceived effect    X X X
Pain medication   X X X X
Satisfaction with treatment    X X X
Satisfaction with results    X X X
Compliance    X   
Quantity, duration and kind of treatment    X X X