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Fig. 3 | BMC Medical Research Methodology

Fig. 3

From: A non-linear optimisation method to extract summary statistics from Kaplan-Meier survival plots using the published P value

Fig. 3

Determining the number of points to calculate an optimal solution using the nlopt method for a non-exact P value. The KM survival probabilities from the same studies as in Fig. 2 were used to calculate ln (HR) (left panel) and var. ln (HR) (right panel) using the nlopt method with a non-exact P value. One hundred Monte Carlo simulations were carried out and the mean and associated standard deviation plotted. The red, dashed horizontal line represents the actual value from the published study

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BMC Medical Research Methodology

ISSN: 1471-2288

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