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BRFSS Annual Survey Data
Survey Data and Documentation
Survey Data Information
The 2011 BRFSS data reflects a change in weighting methodology (raking) and the addition of cell phone only respondents. The aggregate BRFSS combined landline and cell phone dataset is built from the landline and cell phone data submitted for 2011 and includes data for 50 states, the District of Columbia and Puerto Rico. There are two territories (Guam, Virgin Islands) which are not included in the initial data release because current population estimates are not available at this time. These territories will be included after the 2010 Census estimates have been released. Please note the data set naming convention and weighting variables have changed. More information about the changes to the 2011 BRFSS is available, http://www.cdc.gov/surveillancepractice/reports/brfss/brfss.html.
2011 BRFSS
Overview
overview_11.rtf
Provides information on the background, design, data collection and
processing, statistical, and analytical issues for the combined landline and cell phone data set. |
146K |
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2011 BRFSS Codebook
CODEBOOK11_LLCP.rtf
Codebook for the file showing variable name, location, and frequency of
values for all reporting areas combined for the combined landline and cell phone data set. |
4.75MB |
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Calculated Variables in Data Files
2011_calculated_variables.rtf
Description of calculated variables by data variable name. |
2.75MB |
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Comparability of Data
compare_11.rtf
Comparability of data across reporting areas for the combined landline and cell phone data set. The BRFSS 2011 data should be considered a baseline year for data analysis and is not directly comparable to previous years of BRFSS data because of the changes in weighting methodology and the addition of the cell phone sampling frame. |
159K |
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BRFSS Modules
Used
Arranged by state or by category for the combined landline and cell phone data set. |
By State
![](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/spacer.gif)
By
Category |
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Summary Matrix of Calculated
Variables (CV) in the 2011 Data File
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Web Page |
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BRFSS Combined Landline and Cell Phone Weighted Response Rates by State, 2011 |
Web Page |
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Data Files
There are 506,022 records for 2011 for the combined landline and cell phone data set. More information on participation is
available in the states conducting
surveillance, by year table. The data files are provided in
ASCII and SAS Transport formats.
2011 BRFSS Data (ASCII)
Data released August 2012
This file for the combined landline and cell phone data set is in ASCII format. It has a fixed record length of
1518 positions. |
81.3MB
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2011 BRFSS Data (SAS Transport
Format)
Data released August 2012
This file for the combined landline and cell phone data set was exported from SAS V8.2 in the XPT transport format.
This file contains 450 variables. This format can be imported into SPSS
or STATA. Please note: some of the variable labels get truncated in the
process of converting to the XPT format so they may be slightly
different from what is on the SASOUT11.SAS program. |
128.9MB
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Variable
Layout
Format information on variable name by column position. |
142K |
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2011 BRFSS Landline Data
The BRFSS landline data sets contain the data from the states which conducted used optional modules in 2011 only on their landline survey. |
Web Page |
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SAS Resources
The following files are included for use with SAS software developed by
SAS Institute, Inc. The SAS files are programs that can be read using any
text editor. Save SAS files as plain text files.
format11.sas
SAS for Windows program used to generate the 2011 format library. |
187K |
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formats11.sas7bcat
Format library used with the 2011 BRFSS SAS Data File. |
533K |
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SASOUT11_LLCP.SAS
SAS for Windows program to convert the ASCII file into a SAS dataset. |
37K |
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transprt.sas
SAS for Windows program to convert the XPT (SAS Transport) file into a SAS dataset. |
4K |
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formas11.sas
SAS for Windows format
assignment statements. |
13K |
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File Formats
A word about file formats:
The BRFSS Survey Data and documentation are available in several
different file formats. Each available format is described below. |
![Icon Representing RTF Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-rtf.gif) |
Rich Text Format File (RTF).
This format contains plain text and allows for basic formatting. Use
a word processor to view and edit these files. |
![Icon Representing ZIP Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-zip.gif) |
Zip Archive File (ZIP).
The zip format contains one or more files within it and is
compressed to minimize the file's size. Use any zip utility to unzip
these archives. |
![Icon Representing SAS Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-sas.gif) |
SAS Instruction File (SAS). This format
contains plain text which can be edited with a text editor. The
instructions are intended for statistical analysis software
developed by SAS Institute, Inc. |
![Icon Representing SAS Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-sasbcat_lg.gif) |
SAS Version 8 Catalog File (SAS7BCAT). This format
requires the use of statistical analysis software
developed by SAS Institute, Inc. |
![Icon Representing SAS Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-sasbdat_lg.gif) |
SAS Version 8 Datasets File (SAS7BDAT). This
format requires the use of statistical analysis software
developed by SAS Institute, Inc. |
![Icon Representing SPSS Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon_sav_lg.gif) |
IBM SPSS Version 14. This
format requires the use of SPSS statistical analysis software
developed by the IBM Corporation. |
![Icon Representing XPT Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-xpt.gif) |
SAS Transport File (XPT).
This format allows data sets created by the SAS software to be imported directly into other statistical software such as Stata or SPSS. |
![Icon Representing PDF Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-pdf.gif) |
Portable Document
Format File (PDF). This format allows formatting that enables
full document navigation. You will need
Acrobat Reader (a free
application) to view and print this document. |
![Icon Representing TXT Files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon-txt.gif) |
Plain Text File
(TXT). This format contains simple text. Use any text editor to
view and edit these files. |
![Icon Representing comma-separated values files](https://webarchive.library.unt.edu/web/20130301154308im_/http://www.cdc.gov/brfss/images/icon_csv.gif) |
CSV Instruction
File (CSV). This format is a comma-delimited text file which can
be imported by most analysis software. |
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