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Table 4 Comparison of the non-stratified and stratified log-rank type test for different covariate types: power

From: On comparison of net survival curves

  62% events due to ex. haz. 93% events due to ex. haz.
  LRt LRt-str LRt LRt-str
XD, bal (sex); SD, bal, bin 0.498 0.501 0.879 0.882
XD, bal (sex); SD, imbal, bin 0.508 0.510 0.872 0.874
XD, bal (sex); SD, bal, 10 str 0.501 0.498 0.875 0.878
XD, bal (sex); SD, bal, bin, NPH 0.514 0.520 0.887 0.893
XD, bal, bin; SD, bal, bin (sex) 0.483 0.489 0.872 0.875
XD, bal (sex); SD, (age; 3 str) 0.512 0.513 0.871 0.873
  1. Methods included: non-stratified (LRt) and stratified log-rank type test (LRt-str). ((im)bal = (im)balanced variable, i.e., the groups occur with (un)equal probabilities; bin= binary variable; 10 str = 10 strata; NPH = nonproportional effect). X is the categorical covariate of interest, S the stratification covariate, D denotes the demographic variables