SSC 2005 Saskatoon

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Case Studies 2005

Who can give a presentation?

The Case Studies in Data Analysis sessions will be held at the SSC Annual Meeting in Saskatoon June 12 - 15, 2005. Each Case Study will be introduced by a subject-matter expert, so that the teams presenting analyses will not have to repeat the background information. It is expected that each team will have 15 minutes to present their results, but this will depend on the number of teams presenting. You could opt for a poster presentation if you prefer.

The sessions are intended for teams of graduate and senior undergraduate students working either with or without faculty mentors. If you think you might want to participate, please let us know by April 15, 2005 (late registration will be accepted if arrangement is feasible). Contact Alison Gibbs if you will be participating in Case Study 1 and Peggy Ng if you will be participating in Case Study 2. We will need to know the list of names for your team, the university which you represent, and your choice of a platform or poster presentation. We will also need to know if you are giving any other papers at the meeting, to avoid scheduling conflicts.

How to contact us

You will doubtless have questions once you start working on the data. You can ask us, you don’t have to guess the answer! You can direct your questions to us and we will put answers to frequently-asked questions on the web pages. You are free to submit questions in either language, English or French.

Case Study 1

Mailing Address:
Dr. Alison Gibbs
Department of Statistics
University of Toronto

Telephone:
(416) 946-7589

E-mail: alison.gibbs@utstat.utoronto.ca

Case Study 2

Mailing Address:
Dr. Peggy Ng
Atkinson Faculty of Liberal and Professional Studies
Associate Professor in Management Science and Applied Statistics
York University, Toronto

Telephone:
(416) 736-2100 x 77167

E-mail: peggy@mathstat.yorku.ca

Case Studies

Case Study 1

Falls and hip fractures are important sources of morbidity and mortality in the geriatric population. Several studies have identified psychotropic drugs as a risk factor for both falls and hip fracture. The purpose of this study, conducted at Sunnybrook and Women’s College Health Sciences Centre in Toronto, is to examine the effects of antidepressant medications on balance in seniors. The statistical challenges include a small sample size (17 subjects in 4 treatment groups) but more than 1500 potential outcome variables.

Case Study 2

This case study introduces the students to the analysis of longitudinal data using several different approaches (repeated measures, time-varying covariates and growth curves to name a few) as well as introducing the student to the differences in model-based and design-based approaches to estimation. A sub-sample of the synthetic data file from the National Longitudinal Study on Children and Youth (NLSCY) is used to introduce the problems related to estimation and variance calculation in longitudinal surveys. Many issues relating to children’s behaviour and care are important concerns for Canadians and so the data set was created with the objective that the student confronts a realistic situation in a longitudinal study and assesses the best way in which to analyze and present the data.

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