Displaying 1 result from an estimated 1 matches for "hist_grade_4grp".
2010 Sep 08
4
coxph and ordinal variables?
...e to the STATA output. This is tested across the different
approximations, with consistent results. The comparison using Efron
approximation and ordinal data is is below.
Your advice is very much appreciated!
Min-Han
Apologies below for the slightly malaligned output.
STATA output
. xi:stcox i.Hist_Grade_4grp, efr
i.Hist_Grade_~p _IHist_Grad_1-4 (naturally coded; _IHist_Grad_1
omitted)
failure _d: FFR_censor
analysis time _t: FFR_month
Iteration 0: log likelihood = -1133.369
Iteration 1: log likelihood = -1129.4686
Iteration 2: log likelihood = -1129.3196
Iteration 3: log li...