A message from JMP creator John Sall
The validity of the Proportional Hazards assumption is a prerequisite to fit the Cox proportional hazards model or to calculate the Log-rank test in Survival.
How can we check this assumption in JMP?
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Unfortunately, JMP currently doesn't have a way to test the the proportional hazard assumption as you can do in SAS, which is discussed in this paper. http://www.mwsug.org/proceedings/2006/stats/MWSUG-2006-SD08.pdf.
But your request has been noted :-)
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Thank you for notification of my request