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BRFSS Methodology Changes in 2011


Starting in 2011, BRFSS protocol requires that the NJBRFS incorporate a fixed quota of interviews from cell phone respondents along with a new weighting methodology called iterative proportional fitting or "raking". The new weighting methodology incorporates additional demographic information (such as education, race, and marital status) in the weighting process.

These methodological changes were implemented to account for the under-representation of certain demographic groups in the land line sample which resulted in part from the increasing number of U.S. households without land line phones.

Comparisons between 2011 and prior years should therefore be made with caution.

More details about these changes are available from the CDC:
The information provided above is from the Department of Health's NJSHAD web site (https://nj.gov/health/shad). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Thu, 25 April 2024 15:45:59 from Department of Health, New Jersey State Health Assessment Data Web site: https://nj.gov/health/shad ".

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