1. Biostatistics Computing Project by Samy Uguy fall 2003

2. Purpose of the program: to read and access SPSS data files in SAS. to create a SAS program that will link a SAS data set from time one to a SAS data set at time two. to produce a basic descriptive tables (means and percentages).

3. Features use in the program Store SPSS data files in.por (portable file) Convert SPSS data files to SAS data files Create temporary SAS data Proc contents to check what data we have Develop a macro for linking subjects based on selected identifiers Create new ID (play with numbers) Select certain choices over various possible answers for presentation purposes

4. Features continue… Use.first and.last for data elimination to produce certain data sets Create unique, duplicates, and linking only data sets Proc tabulate with ods statement and background style for maneuvering table presentations

5. List of external files used E:\Pre.por E:\Post.por

6. ID CODING SYSTEM region: 9 values (1 digit) agency: coded 101 to 199 (3 digits) program: coded 201 to 299 (3 digits) info1: number of letters in last name. (1 digit) info3: day of birth (2 digits) q1_1 : gender (1 digit) other possible identifiers: age, grade, eye color, parents education (not use in this presentation)

7. Brief Info on the project Youth Tobacco Evaluation Project, which is conducted by VCU, is a State-wide project funded by Virginia Tobacco Settlement Foundation. The evaluation examines whether the intervention programs affect participant knowledge, attitudes, skills, and behaviors. Questionnaires include more than 150 questions in Pre (time 1) and Post (time 2).

8. The project cont. Survey is conducted by the grantees/ agencies Time lapse from Pre (time 1) to Post (time 2) on average is about 6 months Programs are varied (from single session to more than 50 sessions)

9. Here is the SAS program itself