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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