Fig. 3From: Facilitating physical activity and reducing symptoms in patients with knee osteoarthritis: study protocol of a randomized controlled trial to test a theory-based PrevOP-psychological adherence program (PrevOP-PAP)SPIRIT chart of the PrevOP-PAP trial. W: Week. M: Month. T: Time. PrevOP-PAP-I: PrevOP Psychological Adherence Program Intervention condition. PrevOP-PAP-CTRL: Psychological Adherence Program ConTRoL conditionBack to article page