From: Physiotherapy to improve physical activity in community-dwelling older adults with mobility problems (Coach2Move): study protocol for a randomized controlled trial
n = Number of patients per cluster
Sample size per group: 64*0.64*(1 + (n-1)*0.05)* 1/(80%)
#Clusters group: sample size /n
10
75
8
9
72
70
7
67
6
64
11
5
62
13
4
59
15