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Power and sample-size analysis for the Royston–Parmar combined test in clinical trials with a time-to-event outcome: Correction and program update

Author

Listed:
  • Patrick Royston

    (MRC Clinical Trials Unit)

Abstract

The changes made to Royston (2018) and to power_ct are i) in sec- tion 2.4 (Sample-size calculation for the combined test), to replace ordinary least- squares (OLS) regression using regress with grouped probit regression using glm; ii) in section 4 (Examples), to revisit the worked examples of sample-size estima- tion in light of the revised estimation procedure; and iii) to update the help file entry for the option n(numlist). The updated software is version 1.2.0.

Suggested Citation

  • Patrick Royston, 2018. "Power and sample-size analysis for the Royston–Parmar combined test in clinical trials with a time-to-event outcome: Correction and program update," Stata Journal, StataCorp LP, vol. 18(4), pages 995-996, December.
    • Handle: RePEc:tsj:stataj:v:18:y:2018:i:4:p:995-996
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