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Biostatistics and Informatics Seminars

Meetings held Wednesdays at 12:00-1:00 - Education 2 South, Rm 2201 - lunch provided.


Year | Month | Week | Day 
From:    To:    
Start Time Title Description
5/2/2018 12:00:00 PM BIOS Seminar Series MPH capstone practice talks
5/9/2018 12:00:00 PM BIOS Seminar Series Fan Yang Title: Did You Conduct a Sensitivity Analysis? A New Weighting-Based Approach in Evaluations of the Average Treatment Effect for the Treated Abstract: In quasi-experimental research, inference about causality often relies on the strong assumption that there is no hidden bias due to omitted confounders of the relationship between a treatment and an outcome. Through a sensitivity analysis, the analyst attempts to determine whether an analytic conclusion could be easily reversed by a plausible violation of this key assumption. A study is considered incomplete without a careful sensitivity analysis. A new approach to sensitivity analysis on the basis of weighting extends and supplements a number of existing propensity score weighting methods for identifying the average treatment effect for the treated (ATT). In its essence, the discrepancy between a new weight that adjusts for the omitted confounders and an initial weight that omits them captures the role of the confounders. The effect size of a hidden bias is represented as a function of two meaningful sensitivity parameters. Unlike conventional regression-based sensitivity analysis, this new approach conveniently assesses bias associated with one or more omitted confounders; moreover, the number of sensitivity parameters does not increase with the complexity of data generation. Hence this approach reduces the reliance on functional form assumptions and removes constraints on measurement scales. A real data application lays out the implementation procedure and illustrates its broad utility.
5/16/2018 12:00:00 PM BIOS Seminar Series No Seminar - Finals week
 

 Past Seminars

 

Colorado School of Public Health

13001 E. 17th Place
Mail Stop B119
Aurora, CO 80045


303.724.4585
colorado.sph@ucdenver.edu

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