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Table 2 Statistical power calculated from intracluster correlation coefficients (ICC) and numbers of patients per time period

From: Impact of a multifaceted program to prevent postoperative delirium in the elderly: the CONFUCIUS stepped wedge protocol

ICC 60 patients per time period 90 patients per time period 120 patients per time period
0 0.95 0.99 1
0.1 0.87 0.96 0.99
0.2 0.84 0.95 0.98
0.3 0.83 0.94 0.98
0.4 0.83 0.94 0.98
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