From: Study protocol of “CHAPS”: a randomized controlled trial protocol of Care Coordination for Health Promotion and Activities in Parkinson’s Disease to improve the quality of care for individuals with Parkinson’s disease
Effect size
Analytic sample size with 90 % power
0.3
2 × 235 = 470
0.35
2 × 173 = 346
0.4
2 × 133 = 266