• Texas Behavioral Risk Factors

  • Notes and Definitions for Data Users

    Weighted BRFSS data are used in all calculations. BRFSS data are weighted for the probability of selection of a telephone number, the number of adults in a household, and the number of phones in a household and adjusted to reflect the age and sex distribution of Texas' adult population (ages 18 years and older).

    Adults who refused to answer or did not know the answer were generally excluded from any calculations in these tables. However, for a few questions, "Don't Know/Not Sure" responses provided valuable information and were included in the calculations. The sample size for each calculation is the number of adults who responded to the item (exceptions are specified in the footnotes).

    All questions from the survey are not represented in the interactive tables; however, the questions from the questionnaire may be viewed in a PDF document.

    Notes for All Users

    There are some significant advantages of the telephone survey methodology, including better quality control over data collection made possible by a computer assisted telephone interviewing system, relatively low cost, and speed of data collection. The BRFSS methodology has been used and evaluated by the CDC and participating states since 1984. The content of the survey questions, questionnaire design, data collection procedures, interviewing techniques, and editing procedures have been carefully developed to improve data quality and lessen the potential for bias. The data collection is ongoing, and each year new annual results become available.

    One limitation of a telephone survey is the lack of coverage of persons who live in households without a landline telephone. Many young adults are opting to be cellular-only households, and those households that don't have a landline telephone, on average, are lower income. Therefore, for many of the health risks measured, the results are likely to understate the true level of risk in the total population of adults in Texas.

    A second limitation is due to the fact that the data are self-reported by the respondents. Respondents tend to underreport health risk behaviors, especially those that are illegal or socially unacceptable.

Last updated June 17, 2020