Results are based on a random-digit-dialing telephone survey of 4,539 English or Spanish speaking non-institutionalized adults (aged 18 years and older) in the 50 states and the District of Columbia. Two versions of the questionnaire were sequentially administered to the sample. Version 1 had 2,275 respondents and Version 2 had 2,264 respondents. Households were selected from a nationally representative single-stage sample of telephone numbers generated from the GENESYS system. The eligible respondent in a household was selected using the most-recent birthday method. The survey was conducted by a contractor during January 12 - June 20, 2006. Results have been weighted to adjust for number of land phone lines in a household, number of adults in a household, and Census distributions of gender, race/ethnicity, age, and education in the 50 states and District of Columbia.
The number of respondents who answered a question, or sample size ("n"), is shown for each question. Percentages preceding answer text are the weighted percent of respondents who gave that answer. An asterisk (*) denotes a percentage less than one. Text inside of brackets, , was not read to respondents. Row or column percentages may not sum to 100 due to rounding, multiple responses, or both.
Questions that are used for the Healthy People 2010 analysis are marked "HP". Tracking questions from 1988, 1993, 1998, and 2001 are marked TR88, TR93, TR98, and TR01.