VP, Statistical & Strategic Analysis
ICON Late Phase & Outcomes Research
David Pasta has been using SAS since 1977 for a variety of statistical analysis and data management activities. He is author or coauthor of more than 60 peer-reviewed publications and an array of book chapters, technical reports, and other publications and presentations. His areas of focus include the analysis of multiwave longitudinal data, statistical adjustment of group baseline differences and the use of statistical graphics. Much of his work has been in the application of statistics to health-related information reported by patients, including health-related quality of life, patient satisfaction and the psychosocial aspects of human reproductive behavior. Pasta also has extensive experience working on clinical outcomes and the economics of health care and in other fields. He did his undergraduate work in statistics at Princeton University and his graduate work at Stanford University.
How long have you been using SAS®?
What SAS products have you used in the past? What products and solutions are you currently using?
Base SAS®, SAS/STAT®, SAS/GRAPH®, SAS/ETS®, SAS/IML®, SAS® Enterprise Guide®
What is a problem you have solved using SAS?
Fitting separate regression lines "before" and "after" an index event separately for each individual and comparing slopes and intercepts (and their changes) both within patients and across groups of patients.
What is the most innovative way you have used SAS?
Possibly the use of SAS/IML to calculate standard errors for CLASS variables in generalized linear models.
What is your most memorable SAS moment?
Uncovering a bug in a classification procedure that caused SAS to erroneously treat many cases as correctly classified (and explaining the situation to the client).
How has SAS changed in the time you have been using it?
We've gone from one thin manual with SAS defined as "Statistical Analysis System" to scores of manuals. Now SAS means a lot more than its original acronym.
Have you ever attended a SAS users group meeting or SAS Global Forum? If yes, please list them.
SUGI '82 San Francisco. SUGI '83 New Orleans. SUGI 10 Reno. SUGI 11 Atlanta. SUGI 12 Dallas. SUGI 14 San Francisco. SUGI 25 Indianapolis. SUGI 28 Seattle. SUGI 29 Montreal. SUGI 30 Philadelphia. SUGI 31 San Francisco. SGF 2008 San Antonio. SGF 2009 Washington DC. SGF 2010 Seattle. SGF 2011 Las Vegas.
Has your work with SAS been influenced by any other members of the SAS community?
I (and probably every long-time SAS user) have been influenced by Art Carpenter, but I would also give a shout out to the folks who developed the concept of the program data vector.
If you could point a new SAS user to one resource, what would it be?
Lex Jansen's Web page is the one they might not find right away.