Hi All, Most of you may know that in order to do PROC SURVEYLOGSITIC for survey data such as NHIS or NHANES you should have at least 3 important variables: strata, cluster (PSU), and sampling weight. My question is when a survey data does not have cluster variable, is it still appropriate to conduct SURVEYLOGISTIC or it will affect estimation of standard error? what other options that can be helpful to address this issue (bias from neglecting cluster variable in the analysis)? you support is highly appreciated. thanks
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