Prevalence describes the proportion of individuals with a given trait in the population during a specified period of time. It is calculated by using descriptive statistical procedures using software such as SPSS, SAS, and/or SUDAAN.
Vermont tracks risk behaviors and chronic disease using a telephone survey of adults called the Behavioral Risk Factor Surveillance Survey (BRFSS). Vermont participates in the BRFSS with the Centers for Disease Control and Prevention (http://www.cdc.gov/brfss). The results are weighted to represent the adult population (18 or older) of the state. Every year the Vermont Department of Health fields questions related to smoking and tobacco product use status, present and past use. The CDC recommends monitoring smoking and tobacco use and enacting policies and interventions to prevent use among all ages and populations.
As of 2016, the Behavioral Risk Factor Surveillance System (BRFSS) adults with any disability definition includes anyone who reports serious difficulty seeing, hearing, walking or climbing stairs, dressing or bathing, concentrating or making decisions, or who, because of a physical, mental, or emotional condition has difficulty doing errands alone. For additional information on the questions used to collect these data please refer to the Health of Vermonters Living with Disabilities.