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. 2018 Jan 17;15(138):20170696. doi: 10.1098/rsif.2017.0696

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© 2018 The Author(s)

Published by the Royal Society. All rights reserved.

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Figure 5. — Risk ratio (log) and region of bias across the null as a function of true covariate effects β and γ when cluster size is constant and x is cluster randomized: proportion p of clusters have , and remaining 1 − p have . Row (a) shows the value of log[RR], and (b) shows the region of bias across the null. In all plots α = 0.0001, ω = 0.01, N = 500, n_i = 4, T_i = 450 and no subjects are infected at time zero.

Inline graphic — Risk ratio (log) and region of bias across the null as a function of true covariate effects β and γ when cluster size is constant and x is cluster randomized: proportion p of clusters have , and remaining 1 − p have . Row (a) shows the value of log[RR], and (b) shows the region of bias across the null. In all plots α = 0.0001, ω = 0.01, N = 500, n_i = 4, T_i = 450 and no subjects are infected at time zero.