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## William D. Dupont, Ph.D., F.A.S.A.## Professor of
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Email: william.dupont@vumc.org Phone: (615) 343-4100 Fax: (615) 343-4924 Assistant: Cierra Streeter Vanderbilt University School of Medicine Department of Biostatistics Suite 1100, Room 11124 2525 West End Avenue Nashville, TN 37203-8354 |

- Epidemiology
- Breast Disease
- Cancer
- Genetics
- Hormonal Replacement Therapy
- Screening
- Power and Sample Calculations
- Data Management
- Data Quality Assurance
- Clinical Trials
- Stopping Rules
- Foundations of Statistical Inference
- Likelihood methods

Dr. Dupont's other research interests include the development of statistical methods for sample size estimation and power calculations, the estimation of animal abundance, and the philosophical foundations of statistical inference.

PS is an interactive program for performing power and sample size calculations. It can be used for studies with dichotomous, continuous, or survival response measures. The alternative hypothesis of interest may be specified either in terms of differing response rates, means, or survival times, or in terms of relative risks or odds ratios. Studies with dichotomous or continuous outcomes may involve either a matched or independent study design. The program can determine the sample size needed to detect a specified alternative hypothesis with the required power, the power with which a specific alternative hypothesis can be detected with a given sample size, or the specific alternative hypotheses that can be detected with a given power and sample size.

The PS program can produce graphs to explore the relationships between power, sample size and detectable alternative hypotheses. It is often helpful to hold one of these variables constant and plot the other two against each other. The program can generate graphs of sample size versus power for a specific alternative hypothesis, sample size versus detectable alternative hypotheses for a specified power, or power versus detectable alternative hypotheses for a specified sample size. Linear or logarithmic axes may be used for either axes. Multiple curves can be plotted on a single graphic. To download a free copy of this program for Windows computers click here. See also http://en.wikipedia.org/wiki/PS_Power_and_Sample_Size.- Dupont WD and Plummer WD: Density distribution sunflower plots. Journal of Statistical Software, 2003; 8:(3)1-5. Posted at http://www.jstatsoft.org/index.php?vol=8. Accessed May 15, 2003. See also
*Journal of Computational and Graphical Statistics*, 2003;12:247. - StataCorp. 2003.
*Stata Statistical Software: Release 8.0*. College Station, TX: StataCorp LP.

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I | Attachment | Action | Size | Date | Who | Comment |
---|---|---|---|---|---|---|

jpg | Dupont2016.jpg | manage | 82 K | 08 Jun 2016 - 16:29 | WilliamDupont | |

DupontWD_CV.pdf | manage | 472 K | 07 May 2024 - 10:30 | WilliamDupont | CV of W.D. Dupont | |

do | sunflower_example.do | manage | 2 K | 25 May 2004 - 16:55 | DalePlummer | sunflower plot example Stata program |

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Topic revision: r88 - 07 May 2024, WilliamDupont

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