Biostatistics Events

Biostatistics Departmental Calendar

Event
Thu 2/27/2020
Biostatistics Event
Biostatistics Research Day 2020 Biostatistics Event
Biostatistics Research Day 2020
Thu 2/27/2020
1155 Public Health, Foster Conference Room

Biostatistics Research Day is an annual departmental event that showcases student research and promotes interdisciplinary research among graduate students and faculty in Public Health.
This year's speaker is James Dignam, PhD (BIOST '94).


1155 Public Health, Foster Conference Room
Thu 2/27/2020 3:30PM - 4:30PM
Biostatistics Seminar Series
Big Clinical Trials: The NCI National Clinical Trials Network - James Dignam, University of Chicago Biostatistics Seminar Series
Big Clinical Trials: The NCI National Clinical Trials Network - James Dignam, University of Chicago
Thu 2/27/2020 3:30PM - 4:30PM
Public Health Lecture Hall (A115)


Public Health Lecture Hall (A115)
Thu 3/5/2020 3:30PM - 4:30PM
Biostatistics Seminar Series
Lin Chen, University of Chicago Biostatistics Seminar Series
Lin Chen, University of Chicago
Thu 3/5/2020 3:30PM - 4:30PM
Public Health Lecture Hall (A115)


Public Health Lecture Hall (A115)
Thu 3/19/2020 3:30PM - 4:30PM
Biostatistics Seminar Series
Dipankar Bandyopadhyay, Virginia Commonwealth University Biostatistics Seminar Series
Dipankar Bandyopadhyay, Virginia Commonwealth University
Thu 3/19/2020 3:30PM - 4:30PM
Public Health Lecture Hall (A115)


Public Health Lecture Hall (A115)
Sun 3/22/2020 to Wed 3/25/2020
Biostatistics Conference
ENAR 2020 Spring Meeting of the International Biometric Society -- JW Marriott Nashville Biostatistics Conference
ENAR 2020 Spring Meeting of the International Biometric Society -- JW Marriott Nashville
Sun 3/22/2020 to Wed 3/25/2020


Meetings of the Eastern North American Region of the International Biometric Society (a.k.a. "ENAR meetings") are held in late March or early April each year and reflect the broad interests of the Society, including both quantitative techniques and application areas. Faculty and student presenters from the Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations.


Mon 3/23/2020 7:00AM - 8:30AM
Biostatistics Event
Pitt Biostatistics Breakfast at ENAR Biostatistics Event
Pitt Biostatistics Breakfast at ENAR
Mon 3/23/2020 7:00AM - 8:30AM



Thu 4/9/2020 3:30PM - 4:30PM
Biostatistics Seminar Series
Heping Zhang, Yale University Biostatistics Seminar Series
Heping Zhang, Yale University
Thu 4/9/2020 3:30PM - 4:30PM
Public Health Lecture Hall (A115)


Public Health Lecture Hall (A115)
Thu 4/16/2020 3:30PM - 4:30PM
Biostatistics Seminar Series
Jeffrey S. Morris, University of Pennsylvania Biostatistics Seminar Series
Jeffrey S. Morris, University of Pennsylvania
Thu 4/16/2020 3:30PM - 4:30PM
Public Health Lecture Hall (A115)


Public Health Lecture Hall (A115)
Sat 8/1/2020 to Thu 8/6/2020
Biostatistics Conference
Joint Statistical Meetings - - JSM 2020, Philadelphia, PA Biostatistics Conference
Joint Statistical Meetings - - JSM 2020, Philadelphia, PA
Sat 8/1/2020 to Thu 8/6/2020


The Joint Statistical Meetings, known simply as "JSM", is the largest gathering of statisticians held annually in North American. Faculty and student presenters from the  Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations. Our students often receive top awards and participate in the affiliated career marketplace at the event.


Sun 3/14/2021 to Wed 3/17/2021
Biostatistics Conference
ENAR 2021 Spring Meeting of the International Biometric Society -- Baltimore Biostatistics Conference
ENAR 2021 Spring Meeting of the International Biometric Society -- Baltimore
Sun 3/14/2021 to Wed 3/17/2021


Meetings of the Eastern North American Region of the International Biometric Society (a.k.a. "ENAR meetings") are held in late March or early April each year and reflect the broad interests of the Society, including both quantitative techniques and application areas. Faculty and student presenters from the Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations.


Sat 8/7/2021 to Thu 8/12/2021
Biostatistics Conference
Joint Statistical Meetings - - JSM 2021, Seattle, WA Biostatistics Conference
Joint Statistical Meetings - - JSM 2021, Seattle, WA
Sat 8/7/2021 to Thu 8/12/2021


The Joint Statistical Meetings, known simply as "JSM", is the largest gathering of statisticians held annually in North American. Faculty and student presenters from the  Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations. Our students often receive top awards and participate in the affiliated career marketplace at the event.


Sun 3/27/2022 to Wed 3/30/2022
Biostatistics Conference
ENAR 2022 Spring Meeting of the International Biometric Society -- Houston Biostatistics Conference
ENAR 2022 Spring Meeting of the International Biometric Society -- Houston
Sun 3/27/2022 to Wed 3/30/2022


Meetings of the Eastern North American Region of the International Biometric Society (a.k.a. "ENAR meetings") are held in late March or early April each year and reflect the broad interests of the Society, including both quantitative techniques and application areas. Faculty and student presenters from the Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations.


Sat 8/6/2022 to Thu 8/11/2022
Biostatistics Conference
Joint Statistical Meetings - - JSM 2022, Washington, DC Biostatistics Conference
Joint Statistical Meetings - - JSM 2022, Washington, DC
Sat 8/6/2022 to Thu 8/11/2022


The Joint Statistical Meetings, known simply as "JSM", is the largest gathering of statisticians held annually in North American. Faculty and student presenters from the  Department of Biostatistics regularly participate giving invited talks, contributed talks, and poster presentations. Our students often receive top awards and participate in the affiliated career marketplace at the event.


Recent Events

Biostatistics Dissertation Defense

Christopher Keener - Power and Sample Size Determination for Stepped Wedge Cluster Randomized Trials

Wednesday 7/18 10:00AM - 12:00PM
7139 Public Health, Peterson Seminar Room

Christopher Keener of the Department of Biostatistics defends his dissertation on "Power and Sample Size Determination for Stepped Wedge Cluster Randomized Trials".

Graduate faculty of the University and all other interested parties are invited to attend


ABSTRACT:

A stepped wedge trial is a type of cluster randomized trial with unidirectional crossover from control to intervention. In this study, we classified stepped wedge trial designs according to subject recruitment and outcome exposure. Based upon those criteria, we proposed three types of classification, that is, fixed cohort (baseline recruitment with longitudinal exposure), expanding cohort (continuous recruitment with longitudinal exposure), and cross-sectional (continuous recruitment with cross-sectional exposure). For each design type, we proposed a corresponding model for estimating treatment effect. We conducted Monte Carlo simulations to study the impact of design and analytic assumptions on the sample size and power determination. These assumptions include homogeneous or heterogeneous temporal effects between clusters, fixed or time-varying treatment effect, modeling temporal trend through or not through step effects, and choice of correlation structure.  

To investigate how these assumptions were made in the published trials, we conducted a systematic review of 300 stepped wedge trials published up to 2017. From the review we found that more than one fourth of these trials did not make it clear in their reports about the type, the assumptions, or models in estimating treatment effect and sample size calculations. The majority of the trials did not mention the methods for handling missing data. This suggests the need for developing standards of reporting stepped wedge trials like CONSORT for randomized trials or STROBE for observational studies. 

PUBLIC HEALTH SIGNIFICANCE: Stepped wedge trials are popular for evaluating community-based interventions in public health. This research has focused on three areas of improving the design of a stepped wedge trial: classification of key design aspects, power and sample size determination, and modeling method for estimation and inference the effect of an intervention. Sample size determination is important to ensure that the trial is adequately powered. Model misspecification and incorrect analytic assumption both can lead to inflated Type I error rate or an underpowered trial. Our systematic review found that many stepped wedge trials failed to define key aspects and assumptions of their designs when publishing. Thus, use of our classification of stepped wedge trials will improve technical communication on trials commonly used for public health research. 

 

Last Updated On Tuesday, October 9, 2018 by Valenti, Renee Nerozzi
Created On Tuesday, June 12, 2018

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