topic Re: how do I get confidence intervals for proportion in Statistical Procedures

how do I get confidence intervals for proportion

mw2939 — Tue, 07 Jun 2016 23:49:42 GMT

Hello I'm having trouble obtaining 95% CI for a proportion. This proportion is a result of a binary variable crossed with another binary variable. I want to know the 95% CI for percentage of mothers that breastfeed exclusively (yes or no, binary) for women of diferent nationalities (also binary). I've tried variations of proc freq but its giving me the confidence interval of the odds ratio instead of for the actual values of % breastfeeding exclusvely. Any help?

proc freq data=meley.burum2; table momsnationality*exclusive/chisq; run;

*proc freq data=meley.burum2 order=freq;
tables exclusive/binomial;
tables momsnationality/binomial;
weight count;
run;*/

Re: how do I get confidence intervals for proportion

Ksharp — Wed, 08 Jun 2016 02:51:52 GMT

It sounds like you want GROUP analysis.

proc freq data=meley.burum2 order=freq;
BY exclusive;
tables momsnationality/binomial;
weight count;
run;

Re: how do I get confidence intervals for proportion

PGStats — Wed, 08 Jun 2016 04:11:13 GMT

Sort by nationality and get the CI for each.

proc sort data=meley.burum2; 
by momsnationality; 
run;

proc freq data=meley.burum2;
by momsnationality;
tables exclusive / binomial;
weight count;
run;