*(Q) Subject: conditional regression I have matched (on age, sex, and geographic site) data for which I would like to carry out a conditional regression analysis. Can anyone tell me if SPSS can run conditional regression analyses? In particular, conditional logistic regression? *(A) posted to SPSSX-L on 2002/02/06 by Marta Garcia-Granero. * This is a more complete answer to your question * A small dataset to work with *. DATA LIST LIST /pair(f4.0) exposici (f4.0) outcome (f4.0). BEGIN DATA 1 0 0 1 1 1 2 0 0 2 1 1 3 0 0 3 1 1 4 0 0 4 1 1 5 0 0 5 0 1 6 1 0 6 0 1 7 1 0 7 1 1 8 1 0 8 1 1 9 1 0 9 1 1 10 1 0 10 1 1 END DATA. VALUE LABELS exposici 0 "No" 1 "Yes". VALUE LABELS outcome 0 "Control" 1 "Case". * Exposici is the IV, outcome is the DV, * and pair is a variable that matches every case with its control * (there can be more than 1 control, but ONLY 1 case in each stratum) * To perform a conditional logistic regression analysis, you need to create * and extra binary variable "ftime", with values: 1 if subject is case, 2 if control. COMPUTE ftime=1+(outcome=0). EXECUTE. * Now use COXREG stratifing by the matching variable (pair). COXREG ftime /STATUS=outcome(1) /STRATA=pair /METHOD=ENTER exposici /PRINT=CI(95). * In the output, "Exp(b)" is the conditional OR you are looking for.