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Table 4 Results of different multivariate permutation (two-sided) tests applied to the application

From: Multivariate permutation test to compare survival curves for matched data

Time points strategy

N. of time points (years)

Global p-value

  

TSF 2

TLSF 2

TST 2

TLST 2

fixed

4 (0.5,1,2,3)

0.387

0.375

0.263

0.245

fixed

4 (1,1.5,2,3)

0.348

0.338

0.225

0.212

fixed

4 (1,2,3,4)

0.232

0.221

0.213

0.199

perc

9 (0.16-1.74)*

0.665

0.675

0.515

0.486

all

52 (0.19-1.71)*

0.799

0.829

0.630

0.579

  1. * min and max time points.
  2. Results of the comparison of Disease Free Survival (DFS) curves of transplanted patients (n=30) and matched chemotherapy controls (n=130) are reported. Global p-values are shown for Fisher and Tippett second order statistics based on the distance of DFS curves (TSi 1) or their transformation (TLSi 1) and for different choices of the time points (fixed or points at 10-90th percentiles (perc) or 80% of all the observed event times (all)).
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BMC Medical Research Methodology

ISSN: 1471-2288

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