Hi,     I am looking for sas codes to calculate age standardized prevalence.   Data: cross sectional data.   I have calculated the prevalence of body mass index (four categories) and about 10 other categorical variables like the BMI (alcohol use, smoking etc.) by sex (male and female). I used proc frequency and chi-square test to compare prevalence of BMI and the differences of each variable by sex.    However, now I have been asked to do a age standardized prevalence and compare differences by sex. I can calculate the age adjusted prevalence by hand using the population standard age structure (census 2000 US population) but don't know how to do it in sas.   I found an article https://www.cdc.gov/nchs/tutorials/NHANES/NHANESAnalyses/AgeStandardization/Task1b_SAS92.htm but it was not helpful. I appreciate your help.   Thank you Best regards, Akemi   ... View more