BRFSS Data-Adult Asthma Prevalence 2012 to Present

This dataset contains the estimated percent of California adults (18 and older) with lifetime and current asthma (asthma prevalence), by year for 2012 to currently available data. In 2012, the survey methodology of the BRFS changed significantly so that the survey would be more representative of the general population. Several changes were implemented: 1) the survey included both cell and landline random-digit dial components, 2) residents of college housing were eligible to complete the survey, and 3) new methods were used to calculate the survey weights. Due to these changes, estimates from 1984 – 2011 are not comparable to estimates from 2012 and beyond. CDPH and CDC recommend not conducting analyses where estimates from 1984 – 2011 are compared with analyses using the new methodology, beginning in 2012. This includes analyses examining trends and changes over time. Please refer to the attachment for AsthmaPrevalence-Adults-by-Year-CA-Description.pdf.