Skip to main content
. 2017 Jul 13;358:j3064. doi: 10.1136/bmj.j3064

graphic file with name hemk038129.f1.jpg

Fig 1 Power and precision curves for case study with an ICC of 0.03. Curves show increases in power (blue line) and precision (red line) as cluster size increases. Assumes a CRT with 10 clusters in each arm, designed to detect a difference between two proportions 0.6 and 0.45 at a two sided significance level of 5%.