Designing Valid Statistical Studies
taught by Eli Rosenberg and David Kleinbaum
Aim of Course:
This online course, "Designing Valid Statistical Studies" covers the issues that need to be addressed in order for a study to produce statistically valid conclusions. We mainly deal with statistical study designs that are not experiments, and are used with observational data. We use examples mainly from the epidemiology literature, which is where the methodology of observational studies has been used and developed, but the principles apply to any study based on observational data. The first session covers different study designs, with an emphasis on designs that can be used with observational data (clinical trials are reviewed briefly, but those seeking a more in depth treatment should take the Institute's sequence of courses in clinical trial design and analysis). Students will learn what types of bias and extraneous factors can endanger studies, and how to avoid or adjust for them.
This course may be taken individually (one-off) or as part of a certificate program.
WEEK 1: Review Types of Studies, Validity
- Methodologic issues
- Clinical trial (brief overview)
- Validity vrs. precision
- Internal vrs. external validity
WEEK 2: Bias and Confounding
- Selection bias (brief overview)
- Information bias (brief overview)
WEEK 3: Controlling Extraneous factors
- At design stage
- At analysis stage
WEEK 4: Matching and Stratification
Homework in this course consists of short answer questions to test concepts.
Designing Valid Statistical Studies
Who Should Take This Course:
Researchers who need to design, or review the designs of, statistical studies.
While not strictly required, we recommend taking the Institute's introductory statistics sequence
first, as this will enable you to continue with additional Institute courses directly upon completing this course. The mathematics level in this course is basic algebra.
Organization of the Course:
This course takes place online at the Institute for 4 weeks. During each course week, you participate at times of your own choosing - there are no set times when you must be online. Course participants will be given access to a private discussion board. In class discussions led by the instructor, you can post questions, seek clarification, and interact with your fellow students and the instructor.
At the beginning of each week, you receive the relevant material, in addition to answers to exercises from the previous session. During the week, you are expected to go over the course materials, work through exercises, and submit answers. Discussion among participants is encouraged. The instructor will provide answers and comments, and at the end of the week, you will receive individual feedback on your homework answers.
About 15 hours per week, at times of your choosing.
Students come to the Institute for a variety of reasons. As you begin the course, you will be asked to specify your category:
- You may be interested only in learning the material presented, and not be concerned with grades or a record of completion.
- You may be enrolled in PASS (Programs in Analytics and Statistical Studies) that requires demonstration of proficiency in the subject, in which case your work will be assessed for a grade.
- You may require a "Record of Course Completion," along with professional development credit in the form of Continuing Education Units (CEU's). For those successfully completing the course, CEU's and a record of course completion will be issued by The Institute, upon request.
The required course material is ActivEpi courseware, available free online at http://activepi.herokuapp.com . Click "Sign up” in the upper-right, enter the information requested, then confirm your registration via email. Next, use the "log in” button to enter your email address and password, and click the "ActiveEpi Web” course. This courseware contains everything you need to complete the course, but, if you wish, you may purchase a printed version of a companion guide here.
Note: The courseware is also available in CD form (Windows only) from the publisher, Springer, or other retailers such as Amazon.com ("ActivEpi CD”).