Fig. 8From: Effects of influential points and sample size on the selection and replicability of multivariable fractional polynomial modelsData A500, B500, and C500. The plots were created after removing the IPs identified in the multivariable model (results of IPAm in Additional file 1: Table A5). Variable x7, which was irrelevant in the true model, was not selected in each data set, so it was not plottedBack to article page