Cubic Spline with HR

[Ruth George]

Hi everyone,

I'm very new to stata and wanted to run a cubic spline. Ive read a few forums already but can't really wrap my head around it.

Im aiming to run a cubic spline with HR from stcox on the y axis and a continuous variable (z_cvltscore_12) on the x .

This is what I've got so far: [INDENT=2]kspline spcvlt = z_cvltscore_12, cubic nknots(3)

stset fail_19, failure (dead_19=1) origin (drdob_00) enter (drdate_12) exit (fail_19) scale (365.25)
stcox z_cvltscore_12 i.drsex_12 i.cob_gp4 i.educatio i.partnercat_12 alcohol_12 i.smokstat_12new i.exercise_12 i.diabcat_12 i.CVDcat_12 i.depression_12 waist_12 systolic_12 cholhdl_12[/INDENT]
If anyone could help me out this would be great - I want to end up with a figure that shows my HR and confidence intervals.

Thank you!

[Ruth George]

spline spcvlt = z_cvltscore_12, cubic nknots(3)

stset fail_19, failure (dead_19=1) origin (drdob_00) enter (drdate_12) exit (fail_19) scale (365.25)
stcox z_cvltscore_12 i.drsex_12 i.cob_gp4 i.educatio i.partnercat_12 alcohol_12 i.smokstat_12new i.exercise_12 i.diabcat_12 i.CVDcat_12 i.depression_12 waist_12 systolic_12 cholhdl_12[

[Rich Goldstein]

while I'm glad to see that people are still using my (very) old program -spline-, you would generally be better off using the official -mkspline-; see

h mkspline

and look at the third syntax

on the other hand, I don't understand your question and thus don't know whether this will solve your problem