Conditional logistic regression

*(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.