1. Using SDA Services @ ICPSR Part II
ACCOLEDS / DLI Training 2003
December 8 – 10
University of Calgary
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

2. Accoleds/DLI Training 2003 University of Calgary
Contents Roadmap
Overview of SDA
Features
Online Tools: Using the ICPSR Data Analysis System (DAS)
SAMHDA’s TEDS QuickTables
SDA: Mucking about with Data
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

3. Accoleds/DLI Training 2003 University of Calgary
Overview of SDA
SDA (Survey Documentation & Analysis)
Developed at UC, Berkeley
Web software to perform simple data analysis
Tool for Teaching & Classroom use
No need for stats packages on local computers
Browse codebooks
No need to download data & docs
Create summary statistics for reports
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

4. Accoleds/DLI Training 2003 University of Calgary
SDA Features
browse codebooks, questionnaires, documentation
statistical procedures: eg. list values, frequencies, crosstabs, …
manipulate variables eg. Recode, compute new variables, …
custom subsets of selected variables and cases
codebook open in a separate window
download all : data, SPSS/SAS def, docs
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

5. Online Analysis Using the Data Analysis System (DAS)
150 studies available in SDA format
DAS studies related to:
Aging
Criminal Justice
Education
Substance Abuse & Mental Health
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

6. Online Analysis Using the Data Analysis System (DAS)
Special Topic Archives With their Web Sites:
Census 2000 at ICPSR
Election 2000 at ICPSR
General Social Survey (GSSDIRS)
Health and Medical Care Archive (HMCA)
Homicide Research Working Group (HRWG)
International Archive of Education Data (IAED)
National Archive of Computerized Data on Aging (NACDA)
National Archive of Criminal Justice Data (NACJD)
Site for Instructional Materials and Information (SIMI)
Substance Abuse & Mental Health Data Archive (SAMHDA)
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

7. Quick Tables ( source www.DrugAbuseStatistics.samhsa.gov )
Substance Abuse & Mental Health Data Archive (SAMHDA) has new feature: QuickTables
Produces analytic tables via drop down –menus
Available for all Treatment Episode Data Sets (TEDS)
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

8. Quick Tables … ( source www.DrugAbuseStatistics.samhsa.gov )
six easy steps to use Quick Tables
start:
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

9. Quick Tables ….. ( source www.DrugAbuseStatistics.samhsa.gov )
Step 1: Select “Online Analysis” from the SAMHDA front page (
Step 2: Select the Treatment Episode Data Set.
Step 3: In the Quick Tables section, select the TEDS concatenated file. This produces a list of the available Quick Tables for the selected file (see Figure 1)
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

10. Quick Tables ….. ( source www.DrugAbuseStatistics.samhsa.gov )
Step 4: Select desired Quick Table. For the example, select “Client Characteristics by Year”.
Step 5: Left-click on the drop-down menus to select variables for the table(2). Custom Quick Tables may be generated for 11different client characteristics(3) for an individual State or for all States combined. For the example, select “Employment Status” as the client characteristic and limit the table to Maryland. The completed input screen is shown in Figure 2.
2. The year variable is hard-coded for selected TEDS Quick Tables, including the one used for the example.
3. These 11 client characteristics include gender, age group, race, ethnicity, education level, employment status, marital status, pregnancy status, veteran status, living arrangement, and primary source of income
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

11. Accoleds/DLI Training 2003 University of Calgary
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

12. Quick Tables ….. ( source www.DrugAbuseStatistics.samhsa.gov )
…Explanation of Results is found on the final page (cases, desc vriables, publications, citations etc) …… (flip)
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

13. Hands on: Mucking about with Data via SDA
Online Tutorial:
The Web-based SDA programs are intended to be self-explanatory, and there is online help available within each program.
But you can also access the help files at the Online Tutorial page.
Quick Exercise …..
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

14. Hands on: Mucking about with Data via SDA 1
Quick Exercise …..
Example : using SAMHDA data examine association between marijuana use and cigarette smoking.
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

15. Hands on: Mucking about with Data via SDA 2
Select data file….
National Household Survey on Drug Abuse
Then select most recent study ( 2001)…
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

16. Hands on: Mucking about with Data via SDA 3
Consult Codebook….
May be opened in a separate window
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

17. Hands on: Mucking about with Data via SDA 4
Look for variables….
“Have you ever smoked a cigarette”
“Have you ever, even once, used marijuana or hashish”
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

18. Hands on: Mucking about with Data via SDA 5
Finding out about variables….
Double click on variable name to learn additional information …
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

19. Hands on: Mucking about with Data via SDA 6
Analyse variables….
Perform crosstabulation of variables to determine if “Cigarette smoking contributes to a higher probablity of marijuana use” …. (Click Start)

20. Hands on: Mucking about with Data via SDA 7
Enter variables….
Fill in the variable name in the ROW and COLUMN fields.
Recode variables (R: 1=1,3 "yes”; 2 = 2,4 "no") then RUN Table
(NHSDA Uses “logically assigned” valus for cases where respondents have not responded but answer can be infered. Explained in codebook.

21. Hands on: Mucking about with Data via SDA 8

22. Hands on: Mucking about with Data via SDA
“play it again sam”:
Using the GSS survey at ICPSR
GSS Cumulative Datafile
Examine if there are any differences in the "feelings of God" amoung Married people and those who have Never Married?
Use GSS Cumulative datafile choose NEARGOD & MARITAL variables
Filter out other categories (2,3,4)
Using SDA part ii
Accoleds/DLI Training 2003 University of Calgary

23. Hands on: Mucking about with Data via SDA
“play it again sam”:

24. Hands on: Mucking about with Data via SDA