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Filtering by: Advisor Borsa, Paul A. Academic Affiliation Statistics

Extensions of the proportional hazards loglikelihood for censored survival data

Creator:

Derryberry, DeWayne R.

Abstract:

The semi-parametric approach to the analysis of proportional hazards survival data is relatively new, having been initiated in 1972 by Sir David Cox, who restricted its use to hypothesis tests and confidence intervals for fixed effects in a regression setting. Practitioners have begun to diversify applications of this model, constructing...

Resource Type:

Dissertation

Full Text:

likelihood for Censored Survival Data. Abstract approved: Paul A. Murtaugh The semi-parametric approach
An Evaluation of Design and Inference in Special Topics of Group Sequential Procedures

Creator:

Skalland, Timothy Michael

Abstract:

Randomized trials are the gold standard for the clinical assessment of a new treatment compared to a placebo or standard of care. Often in clinical trials, patients are accrued sequentially rather than all at once. Thus, the data from such a trial becomes available sequentially to the researcher. Monitoring and...

Resource Type:

Dissertation

Full Text:

: Sarah C. Emerson Randomized trials are the gold standard for the clinical assessment of a new treat
Modeling Density Dependence in the Presence of Measurement Error

Creator:

Payton, Quinn

Abstract:

Density dependence is an ecological concept concerning the mechanisms of change in the size of a population. The inability to census ecological populations confounds approaches to identify and quantify the level of density dependence. Statistical tests which ignore the presence of measurement error tend to result in misspeci fied type...

Resource Type:

Dissertation

Full Text:

Dependence in the Presence of Measurement Error Abstract approved: Paul A. Murtaugh Virginia M. Lesser