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Fig. 2 | BMC Medical Research Methodology

Fig. 2

From: Augmenting the logrank test in the design of clinical trials in which non-proportional hazards of the treatment effect may be anticipated

Fig. 2

Smoothed scatter plots of scaled Schoenfeld residuals for the treatment variable in the three trials denoted by (a), (b) and (c). Grey shaded areas show pointwise 95 % confidence intervals. Solid horizontal lines show y= ln HR, the (constant) log hazard ratio estimated by a Cox model. Dashed horizontal lines show y=0, corresponding to ln(HR) =0, null treatment effect

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