data lbwt11; set "c:\data\lbwt11"; run; proc print data = lbwt11; run; proc logistic data = lbwt11 descending; model lbwt = lastwt smoke race2 race3 ptd ht ui; strata pairid; run; data bbdm13; set "c:\data\bbdm13"; run; proc logistic data = bbdm13 descending; model fndx = chk agmn wt mod wid nvmr; strata str; run;