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Table 2 Sample size calculations

From: Social network distribution of syphilis self-testing among men who have sex with men in China: study protocol for a cluster randomized control trial

SST and standard of care

ICC

0.01

 

Mean difference

0.55

 

Standard deviation

0.8

 

COV of cluster sizes

0.65

 

Number of people per cluster

10

 

Alpha

0.05

 

Power

0.8

 

Total sample size per arm

60

 

Number of clusters per arm

6

LINK and standard of care

ICC

0.01

 

Mean difference

0.4

 

Standard deviation

0.8

 

COV of cluster sizes

0.65

 

Number of people per cluster

10

 

Alpha

0.05

 

Power

0.8

 

Total sample size per arm

80

 

Number of clusters per arm

8

  1. ICC Intra-class correlation, COV Coefficient of variation