English, Article edition: STARJAS: Stata module to produce Arjas plot to check proportional hazards assumption Enzo Coviello

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Bookmark: http://trove.nla.gov.au/version/175014
Physical Description
  • code
Language
  • English

Edition details

Title
  • STARJAS: Stata module to produce Arjas plot to check proportional hazards assumption
Author
  • Enzo Coviello
Physical Description
  • code
Notes
  • Arjas plots allow to check if a categorical covariate should be included in a proportional hazards model and if this covariate has proportional hazards. For each level a line is plotted. If the covariate does not need to be in the model then for each value a roughly 45° line through origin should be plotted. Otherwise Arjas plots will give curves which are approximately linear but with slope differing from 1. If a covariate has a nonproportional effect on the hazard rate then the curves will differ nonlinearly from 45° line. Assume an indicator variable having only two values 0 and 1, the curve for the level 1 should be concave if the hazard ratio is increasing in t whereas the curve for the level 0 should be convex.
  • proportional hazards, Arjas plot
  • RePEc:boc:bocode:s456813
Language
  • English
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