National Addiction & HIV Data Archive Program

What are the main components of the SDA interface?

In 2008 SAMHDA upgraded the appearance of the Survey Documentation and Analysis (SDA) system. The new interface allows users greater navigational ability within SDA. All of the statistical procedures are still available as they were previously. Users who prefer to use the original interface may still do so by selecting the link entitled Use Classic Interface in the upper-left corner of the screen. For further information about SDA, please select the Getting Started button located in the upper-right portion of the screen.Users no longer need to open the codebook in a separate browser to view a list of variables. Also, users can now switch between the various statistical procedures without having to return to the main analysis page. These improvements are possible because the screen splits into the following four windows:

  1. Program Selection Window. Select from programs to perform analysis, create or recode variables, download the dataset or a customized data subset, view the codebook, or view the help file Getting Started.

  2. Variable Selection Window. The buttons within this window change depending on the type of analysis selected. Variables are selected and placed into the box. The user can then specify which analysis field the variable should go into (i.e., row or column for a crosstabulation, independent or dependent for a regression, or used as a control or filter variable). Users can also obtain a frequency table and accompanying question text for that variable by selecting the View button.

  3. Variable Tree Window. All variables and variable labels are listed and organized as they appear within the codebook, into groups with headings and subheadings. Click on the +/- boxes next to the heading to view all the variables within a selected group. When a variable of interest is located, select it and the program will place it into the variable selection window.

  4. Analysis Window. This screen will display the required and optional fields for the type of analysis you have selected. This screen looks identical to the classic interface for each of the analytic features available.