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Table 2 Sample size calculation

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 8
8 70 9
7 67 10
6 64 11
5 62 13
4 59 15