af2a44c6_l__Variance_Estimation__Task_3_SUDAAN_proc_descript_procedure_Explanation
[Statements] proc sort data =BP_analysis_Data; by sdmvstra sdmvpsu; run ; [Explanation] 
Use the SAS procedure, proc sort, to sort the data by the design parameters, strata (sdmvstra) and primary sampling units (sdmvpsu), before running the procedure in SUDAAN.
Continuous NHANES Web Tutorial: Variance Estimation: Task 3
Explanation