Addressing Missing Data In Clinical Trials
*Thomas Fleming, University of Washington Keywords: The reliability and interpretability of results from clinical trials can be significantly diminished by missing data. Frequently used approaches to address these concerns, such as upward adjustments in sample sizes or simplistic imputation methods such as ‘last observation carried forward’, ‘complete case’ or ‘worst case’ analyses, usually are inadequate. Methods for imputation, in addition to being widely understandable, should be based on rational pre-specified approaches that provide a practically achievable reduction in bias. While rational imputation methods are useful, the preferred and often only satisfactory approach to addressing missing data is to prevent it! To meaningfully reduce the level of missing data, it is important to recognize and address many factors that commonly lead to higher levels of missingness. Approaches to reduce missing data will be discussed.
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Key Dates
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April 30 - May 22, 2013
Invited Abstract Submission Open -
June 4, 2013
Online Registration Opens -
August 9 - August 23, 2013
Invited Abstract Editing -
August 23, 2013
Short Course materials due from Instructors -
August 26, 2013
Housing Deadline -
September 9, 2013
Cancellation Deadline and Registration Closes @ 11:59 pm EDT -
September 16 - September 18, 2013
Marriott Wardman Park, Washington, DC