Greetings all. I am working on a project in which immunization data from Childcare Group Settings is analyzed. The SAS Program that is used to run the analysis utilizes Proc Surveymeans. The Strata are 8 different Districts in my state. The Clusters are the individual Childcare Settings. And the Domain are 5 different Age Groups (2-3 months, 4-5 months, 6-18 months, 19-35 months, and 36-59 months). I am receiving a Note in the Log which appears to have no Logic behind it: "NOTE: Only one cluster in a stratum for Age_Group_Num domains for variable(s) Up_to_Date, DTap!, DTaP2, Polio1, Polio2, Hib1, Hib2, HepB1, HepB2, PCV1, PCV2, Rota1, Rota2, exemption_cat. The estimate of variance for Up_to_Date, DTap!, DTaP2, Polio1, Polio2, Hib1, Hib2, HepB1, HepB2, PCV1, PCV2, Rota1, Rota2, exemption_cat will omit this stratum." To me this note implies that in a particular District(Strata), that there is only one Childcare Setting(Cluster) that serves a particular Age Group(Domain). But this is not the case. There are at least 2 Clusters that serve each of the Age Groups(Domain). Thus I do not understand why this note is presenting. Have I misinterpreted the Note? In trial and error I noticed that when the Strata Statement is removed from the Proc that the Note no longer presents, and the confidence intervals are smaller (which is usually good, but accuracy is more important). Any help into this matter would be greatly appreciated!! Thank you.
... View more
