Skip to main content

Table 4 Analytic sample sizes, across a range of effect sizes and retention rates

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