Dear
Please suggest me in my pgm how to calculate stratified p_value. The stratification factors are (age ss ph). Thank you
data one;
input trt res$ age ss ph $;
datalines;
1 cr 55 1 Y
1 cr 53 1 N
1 cri 52 1 Y
1 cri 58 1 N
1 cri 50 2 N
1 cr 53 2 N
1 cri 52 2 Y
1 cri 58 2 N
2 cri 56 2 Y
2 cri 51 2 N
2 cr 50 2 Y
2 cr 56 2 N
;
proc freq data = one;
table age*ss*ph*trt*res/ alpha = 0.05 chisq pdiff cl nocol nopercent ;
exact chisq / alpha = 0.05 ;
ods output chisq = exact (where = (upcase(statistic) = 'CHI-SQUARE')) ;
output out = pval(rename = (p_pchi = pval)) pchi ;
run ;
Are you requesting stratification by Age (only) SS (only) and PH (only) for the TRT*RES? If so perhaps
proc freq data = one; table (age ss ph)*trt*res/ alpha = 0.05 chisq pdiff cl nocol nopercent ; exact chisq / alpha = 0.05 ; ods output chisq = exact (where = (upcase(statistic) = 'CHI-SQUARE')) ; output out = pval(rename = (p_pchi = pval)) pchi ; run ;
You can group variables by role in Proc Freq table statements with ( )
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