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Table 1 Data A250. Univariable analysis for continuous variables. Columns 2–4 show the p-values for different FP tests; column 5 gives the final FP powers and indicates whether a variable was excluded; the last column shows the FP powers for the true multivariable model used to generate the data

From: Effects of influential points and sample size on the selection and replicability of multivariable fractional polynomial models

Variable

FP2 vs. Null

FP2 vs. Linear

FP2 vs. FP1

Final selection

True model

x1

0.001

0.165

0.391

1

0.5, 1

x3

0.856

0.765

0.659

Out

1

x5

0.000

0.000

0.033

0, 3

−0.2

x6

0.002

0.046

0.265

0

0

x7

0.012

0.449

0.678

1

Out

x10

0.135

0.314

0.295

Out

1

  1. P-values in bold indicate the first non-significant test of the FSP