STDRATE Procedure
The STDRATE procedure computes direct standardized rates and risks for study populations, rate and risk differences, and rate and risk ratios.
The following are highlights of the STDRATE procedure's features:
 computes normal, lognormal, and gamma distribution confidence intervals for directly
standardized rates and risks
 compares two directly standardized rates or risks from different populations
 provides MantelHaenszel estimates for homogeneous effects across strata
 computes indirect standardized rates and risks, including standardized morbidity/mortality ratio(SMR)
 computes normal, lognormal, and Poisson distribution confidence intervals for SMR
 computes the attributable fraction and population attributable fraction by using either indirect
standardization or MantelHaenszel estimation

 automatically produces the following plots by using ODS Graphics:
 proportion of exposed time or sample size for each stratum in the populations
 proportion of exposed time or sample size for each stratum in the populations
 stratumspecific rate estimates and their confidence limits of populations
 stratumspecific risk estimates and their confidence limits of populations
 SMR for each stratum in the populations
 performs BY group processing, which enables you to obtain separate analyses on grouped observations

For further details see the SAS/STAT User's Guide:
The STDRATE Procedure
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Examples