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2015 BRFSS Methodology
The local BRFSS is a point-in-time survey conducted via telephone interviews of randomly selected adults aged 18 years and older from either randomly sampled, telephone-equipped city of Cleveland households, or adults living in the city of Cleveland that use their cell phones as their primary telephone. Since the first survey conducted in 2005, the Prevention Research Center for Healthy Neighborhoods (PRCHN) at Case Western Reserve University has contracted with ICF International, Inc. (ICF), a firm specializing in survey research, to conduct the phone surveys, conducted in both English and Spanish. The average survey takes 20-25 minutes and the overall response rate has been between 25-30%, which is typical of these kinds of surveys.
Participant answers are aggregated and then weighted to represent the entire population it was sampled to represent (i.e., all adults in city of Cleveland, all adults in Cuyahoga County). On the technical side, this weighting corrects for unequal probabilities of selection into the sample, and weighting procedures are consistent with CDC-established protocols. After survey administration, a final dataset is delivered to researchers at the Center for dataset cleaning, coding, analyses, and dissemination of results.
Weighted Survey Samples by Year 
 YearSample*  Weighted Sample
2005 1150 302,904 
20061490 301,086 
 2007 1259299,628 
20081251 297,798
 2009 1143 296,887 
20152187 253,893
                           *number of complete, valid surveys
For the full methodology report, click HERE. 
For the full 2015 BRFSS Questionnaire, click HERE. 
For past BRFSS Questionnaires, click HERE.