Currently I'm analyzing complex survey design data. I have missing values for most of my variables due to recoding form non-responses such as 99, 999, 9999 etc. When I fit the multiple model using CLUSTER, STRATUM and PERWEIGHT options the model was severely affected due to missing values. How can I handle the missing and fit the model with the following?  PROC SURVEYLOGISTIC DATA= <hjGG> WEIGHT PERWEIGHT; Cluster PSU; Stratum Domain;  Class <abcm>; Model hhchc=<gahdj>; RUN; ... View more