Encountering very long processing times when trying to assess the proportional hazards assumption in a Cox regression model. I am having to terminate the process due to long wait times. The problem persists regardless of whether I am using SAS Base 9.4 (on Windows desktop) or SAS Studio (Mac). Below is the code, where &cat is a list of categorical variables (n=23), and &cont is a list of continuous variables (n=3).
proc phreg data=work.outcomes_fnl3_wocong;
class
demo_age1 (REF='<50') demo_gender (REF='M') primdx (REF='Ischemic')
preop_cr1 (REF='<0.9') preop_bili1 (REF='<1.2')
comorb_dm (REF="0") comorb_dial (REF="0") comorb_copd (REF="0") comorb_htn (REF="0") comorb_cvd (REF="0")
preop_abo (REF='A') preop_pra_sens (REF="<20")
preop_ino (REF="0") preop_ecmo (REF="0") preop_iabp (REF="0") preop_vent (REF="0")
cvs_prev_typ (REF="VALVE")
donor_age1 (REF='<50') donor_gender (REF='M') donor_cod (REF='Head Trauma')
induct (REF='0')
postop_plasma (REF='0')
op_era (REF="2004-2010")
/ param=ref;
model mort_y*mort(0)=&cat &cont / rl SELECTION = STEPWISE SLS = .05 SLE = .05;
assess var=(&cont)ph / resample;
run;
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