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Table 7 Analysis results of actual example (intervention indicator only)

From: Comparison of statistical models for estimating intervention effects based on time-to-recurrent-event in stepped wedge cluster randomized trial using open cohort design

Dealing with clusters Statistical model Parameter Estimates Standard Error   
HR [95%CI] p-value
With stratification by clusters AG 0.033 0.122 1.034 [0.814, 1.314] 0.785
PWP-TT -0.061 0.123 0.941 [0.739, 1.198] 0.621
PWP-GT 0.054 0.117 1.056 [0.840, 1.327] 0.641
Without stratification by clusters AG 0.096 0.094 1.102 [0.915, 1.326] 0.306
PWP-TT 0.040 0.095 1.041 [0.863, 1.254] 0.676
PWP-GT 0.087 0.091 1.090 [0.912, 1.304] 0.360
  1. AG Andersen-Gill, PWP-TT Prentice-Williams-Peterson Total-Time, PWP-GT Prentice-Williams-Peterson Gap-Time, HR Hazard ratio, CI Confidence interval