Dates, sample size, and response rates for VCU Life Sciences Surveys, 2002 to 2010.

Note: Survey data collected by the Virginia Commonwealth University Life Sciences Surveys, 2002–2010. No survey was conducted in 2009. The survey questions were developed jointly by VCU Life Sciences and by the VCU Center for Public Policy. All surveys by the designated survey firms were conducted by either landline or cell phone. The sample of landline and cell telephone numbers was designed so that all residential telephones, including new and unlisted numbers, had a known chance of inclusion. Response rates based on AAPOR RR3 calculation method. The data used in our analysis were weighted to adjust for unequal probabilities of selection due to multiple adults living in the household. In addition, the data are weighted on sex, age, education, race/ethnicity, and region to reflect the demographic composition of the adult population in the U.S. The surveys in 2008 and 2010 were additionally weighted by population density. All percentages reported in the current study's figures and tables are weighted.