https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13807#M265 Hi sagar,<BR /> <BR /> Here is one way to calculate RR and it's 95% CI:<BR /> <BR /> data risk;<BR /> input trt $ outcome $ count;<BR /> datalines;<BR /> A yes 19<BR /> A no 39<BR /> B yes 29<BR /> B no 44<BR /> ;<BR /> <BR /> proc freq data=risk;<BR /> table trt*outcome/relrisk;<BR /> weight count;<BR /> run; Mon, 09 Nov 2009 20:26:17 GMT statsplank 2009-11-09T20:26:17Z https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13806#M264 I need some procedure to calulate risk ratio and confidence interval for two treatment groups A and B , I am very new to Statistics, so kindly help.<BR /> <BR /> The data is like as shown below:<BR /> <BR /> EVENT Treatment_A Treatment_B<BR /> ABC 19 29<BR /> <BR /> And i Need to calculate RR and CI as follows <BR /> <BR /> EVENT TRT_A (N=58) TRT_B(N=73) RR(95% CI Lower-Upper)<BR /> ABC 20 21 1.21(0.76,1.93) Mon, 09 Nov 2009 09:47:09 GMT https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13806#M264 deleted_user 2009-11-09T09:47:09Z https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13807#M265 Hi sagar,<BR /> <BR /> Here is one way to calculate RR and it's 95% CI:<BR /> <BR /> data risk;<BR /> input trt $ outcome $ count;<BR /> datalines;<BR /> A yes 19<BR /> A no 39<BR /> B yes 29<BR /> B no 44<BR /> ;<BR /> <BR /> proc freq data=risk;<BR /> table trt*outcome/relrisk;<BR /> weight count;<BR /> run; Mon, 09 Nov 2009 20:26:17 GMT https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13807#M265 statsplank 2009-11-09T20:26:17Z https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13808#M266 Thank you so much. Tue, 10 Nov 2009 08:23:08 GMT https://communities.sas.com/t5/Statistical-Procedures/Risk-Ratio-and-Confidence-interval/m-p/13808#M266 deleted_user 2009-11-10T08:23:08Z