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. 2018 Aug 1;21(1):102–121. doi: 10.1093/biostatistics/kxy031

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Fig. 4. — Comparison between SWD and pCRD. There are no time effects in the model for figures in the left column, and moderate time effects in the model for figures in the right column. (a) and (b) power vs. the number of clusters, with baseline risk , the risk difference , the cluster size , and ; (c) and (d) power vs. the risk difference , with baseline risk , the cluster size , the , and the number of steps ; (e) and (f) power vs. ICC, for different baseline risks , where the risk difference , the cluster size , and the number of steps .

Inline graphic — Comparison between SWD and pCRD. There are no time effects in the model for figures in the left column, and moderate time effects in the model for figures in the right column. (a) and (b) power vs. the number of clusters, with baseline risk , the risk difference , the cluster size , and ; (c) and (d) power vs. the risk difference , with baseline risk , the cluster size , the , and the number of steps ; (e) and (f) power vs. ICC, for different baseline risks , where the risk difference , the cluster size , and the number of steps .