Behavioral Risk Factor Surveillance System
Each year, the Division of Public Health Services (DPHS) conducts a telephone health survey of NH adults. This survey, called the Behavioral Risk Factor Surveillance System (BRFSS) survey is supported by a grant from the Centers for Disease Control and Prevention (CDC).
Results of the survey are used for planning and evaluating public health programs, focusing resources and monitoring the health of NH residents.
The primary focus of the survey is on behaviors and conditions that are linked with the leading causes of death – heart disease, cancer, stroke, diabetes, and injury – and other important health issues.
- Overweight and obesity
- Injuries (use of seat belts and prevalence of falls)
- Using tobacco
- Abusing alcohol
- Preventive medical care, such as flu shots, and cancer screening tests
The health survey is part of a state-based system of health surveys that includes all 50 states, the District of Columbia, Guam, Puerto Rico, and the U.S. Virgin Islands. NH joined the BRFSS in 1987 and has conducted a survey each year since. In NH, interviews are conducted through a contract with a survey research firm. Work by the firm is carefully monitored by Bureau.
The BRFSS also can be used to collect information on urgent public health issues. For example, in 2009 and 2010, questions were quickly added to the BRFSS to monitor vaccination rates for the 2009 H1N1 influenza outbreak as well as flu-like illness.
In 2011, the NH BRFSS began to include cellular telephones in its annual survey. This change has the advantages of maintaining the representativeness, coverage and validity of the BRFSS data. Also in 2011, a new weighting methodology—raking, or iterative proportional fitting—replaced the post-stratification weighting method that had been used with previous BRFSS data sets. In addition to age, gender, and race/ethnicity, raking permits more demographic variables to be included in weighting, such as educational attainment, marital status, tenure (property ownership), and telephone ownership. Including new variables in the weighting process can reduce the potential for selection bias while increasing representation. For more information see the Methodologic Changes in the Behavioral Risk Factor Surveillance System in 2011 and Potential Effects on Prevalence Estimates, MMWR Weekly June 8, 2012 / 61(22);410-413.
Note: Estimates from the 2011 BRFSS may not be comparable to estimates created in previous years.
From time to time the BRFSS conducts additional, specialized surveys. Beginning in 2006, BRFSS respondents with asthma were invited to participate in a follow up survey about asthma awareness and control. Results from this may be found on the Asthma Control Program Web page at www.dhhs.nh.gov/dphs/cdpc/asthma.
For more information about the BRFSS or to see results from the survey, please visit the CDC BRFSS Web site at www.cdc.gov/brfss or contact the Health Statistics and Data Management Section in the Division of Public Health Services.
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