Prognostic factors of adherence 65 Table 1 Summary of findings Outcomes Effect measure (95%CI) No of participants (studies) Quality of the evidence (GRADE) Comments Patient related prognostic factors of exercise adherence Self-efficacy OR 1.58 (1.27-1.97) 4226 (18 studies) ÄÄÄO Moderate1, 2, 6 More self-efficacy predicts better exercise adherence. Exercise history OR 4.05 (1.10-14.90) 3670 (10 studies) ÄÄÄO Moderate1, 2, 6 Having a history of exercise predicts better exercise adherence. Intention OR 1.47 (0.98-2.19) 864 (5 studies) ÄÄÄO Moderate1, 2, 6 Intention is not predictive of exercise adherence. Motivation OR 1.25 (1.12-1.39) 2532 (5 studies) ÄÄÄO Moderate1, 2, 6 Being more motivated predicts better exercise adherence. Attitude OR 1.76 (0.69-4.48) 693 (2 studies) ÄÄÄO Moderate3, 6 Attitude is not predictive of exercise adherence. PBC OR 1.21 (1.07-1.36) 215 (2 studies) ÄÄÄÄ High4, 6 Having a higher PBC predicts better exercise adherence. Perceived benefits OR 0.72 (0.13-4.05) 329 (2 studies) ÄÄÄO Moderate5, 6 Perceived benefits are not predictive of exercise adherence. Social-economic factors of exercise adherence Education OR 2.07 (1.51-2.82) 19705 (8 studies) ÄÄÄO Moderate1, 6 Higher education predicts better exercise adherence. Social support OR 1.37 (0.92-2.05) 2035 (8 studies) ÄÄOO Low1, 5, 6 Two studies reported more social support as a negative predictor of exercise adherence. The other studies showed more social support as a positive predictor. Age OR 0.82 (0.57-1.20) 1882 (5 studies) ÄÄOO Low1, 5, 6 Age is not predictive of exercise adherence.
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