For the variable “ganxietyev” (Ever had general anxiety disorder), over 68% of the population is “NIU” or not in the universe. The universe tab for ganxietyev states “2008: Sample adults age 18+.”
Would this mean that all those not in the universe are under the age of 18, or does this also include individuals who were not surveyed about general anxiety disorder?
I’m trying to find the prevalence of general anxiety disorder for a population, so would I exclude the NIU answers and therefore scale up the responses for the smaller population?
Thank you for your help!