SDA allows you to conduct statistical analysis quickly and efficiently on the Internet using your Web browser. The software powering this system, developed by the Computer-assisted Survey Methods Program at the University of California at Berkeley, is called Survey Documentation and Analysis (SDA).
SDA allows you to manipulate and analyze data without downloading files or using specialized statistical software. SDA performs a wide range of statistical analyses, from bivariate crosstabulation to multiple regression and analysis of variance. SDA allows users to design and implement custom recodes as well as generate subsets of data for download and analysis with traditional statistical applications.
For more information on all SDA features, see the Users Guide.
Also see the SAMHDA SDA page to learn more about the datasets that are available for online SDA analysis and to learn how to search for specific variables across datasets.
The 2005 Treatment Episode Data Set (TEDS) is used as an example throughout the tutorial.
The 2005 TEDS data file contains almost 1.9 million cases (records). Each case is a specific substance abuse treatment episode. Note that an individual could have more than one substance abuse treatment episode and could therefore be included more than once in the data file.
View a summary of the TEDS study.
Continue to the SDA Codebook Tutorial