Thomas Louis

Professor Emeritus

1971 …2020
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Research Output 1971 2020

1997

Consistency of maximum likelihood estimators in general random effects models for binary data

Butler, S. M. & Louis, T., Feb 1997, In : Annals of Statistics. 25, 1, p. 351-377 27 p.

Research output: Contribution to journalArticle

Mixing Distribution
Random Effects Model
Binary Data
Maximum Likelihood Estimator
Fixed Effects
1996

Applications of research synthesis

Louis, T., 1996, In : Clinical Research and Regulatory Affairs. 13, 1, p. 5-11 7 p.

Research output: Contribution to journalArticle

Research

Bootstrap techniques for proportional hazards models with censored observations

Zelterman, D., Le, C. T. & Louis, T., 1996, In : Statistics and Computing. 6, 3, p. 191-199 9 p.

Research output: Contribution to journalArticle

Censored Observations
Proportional Hazards Model
Bootstrap
Hazards
Covariates

Consistency in performance among primary care practitioners

Palmer, R. H., Wright, E. A., Orav, E. J., Hargraves, J. L. & Louis, T., Sep 1996, In : Medical Care. 34, 9 SUPPL.

Research output: Contribution to journalArticle

Primary Health Care
Guidelines
performance
Patient Care
patient care

Generating pseudo-random variables from mixture models by exemplary sampling

Anderson, J. E. & Louis, T., 1996, In : Journal of Statistical Computation and Simulation. 54, 1-3, p. 45-53 9 p.

Research output: Contribution to journalArticle

Mixture Model
Random variables
Random variable
Sampling
Distribution functions

Hormone replacement therapy is associated with lower risk of adenomatous polyps of the large bowel: The Minnesota Cancer Prevention Research Unit case-control study

Potter, J. D., Bostick, R. M., Grandits, G. A., Fosdick, L., Elmer, P., Wood, J., Grambsch, P. & Louis, T., Oct 1996, In : Cancer Epidemiology Biomarkers and Prevention. 5, 10, p. 779-784 6 p.

Research output: Contribution to journalArticle

Adenomatous Polyps
Hormone Replacement Therapy
Case-Control Studies
Colonoscopy
Research

Identifying areas with elevated disease incidence rates using empirical Bayes estimators

Devine, O. J., Louis, T. & Halloran, M. E., 1996, In : Geographical Analysis. 28, 3, p. 187-199 13 p.

Research output: Contribution to journalArticle

disease incidence
incidence
Disease
simulation
brain

Identifying areas with elevated disease incidence rates using empirical Bayes estimators

Devine, O. J., Louis, T. & Halloran, M. E., Jul 1996, In : Geographical Analysis. 28, 3

Research output: Contribution to journalArticle

disease incidence
incidence
Disease
simulation
rate

Leadership for quality improvement in group practices

Palmer, R. H., Hargraves, J. L., Orav, E. J., Wright, E. A. & Louis, T., Sep 1996, In : Medical Care. 34, 9 SUPPL.

Research output: Contribution to journalArticle

Group Practice
group practice
Quality Improvement
leadership
leader

Tests of independence for bivariate survival data

Shih, J. H. & Louis, T., Dec 1996, In : Biometrics. 52, 4, p. 1440-1449 10 p.

Research output: Contribution to journalArticle

Test of Independence
Survival Data
Statistics
Test Statistic
Supremum

What makes quality assurance effective? Results from a randomized, controlled trial in 16 primary care group practices

Palmer, R. H., Louis, T., Peterson, H. F., Rothrock, J. K., Strain, R. & Wright, E. A., Sep 1996, In : Medical Care. 34, 9 SUPPL.

Research output: Contribution to journalArticle

Group Practice
group practice
quality assurance
Primary Health Care
Randomized Controlled Trials
1995

Assessing gamma frailty models for clustered failure time data

Shih, J. H. & Louis, T., Jun 1995, In : Lifetime Data Analysis. 1, 2, p. 205-220 16 p.

Research output: Contribution to journalArticle

Failure Time Data
Frailty Model
Frailty
Clustered Data
Hazards

Calcium and colorectal epithelial cell proliferation in sporadic adenoma patients: A randomized, double- blinded, placebo-controlled clinical trial

Bostick, R. M., Fosdick, L., Grambsch, P., Grandits, G. A., Louis, T., Potter, J. D., Wood, J. R. & Lillemoe, T. J., Sep 6 1995, In : Journal of the National Cancer Institute. 87, 17, p. 1307-1315 9 p.

Research output: Contribution to journalArticle

Controlled Clinical Trials
Adenoma
Epithelial Cells
Placebos
Cell Proliferation

Effects of antihypertensive therapy on serum lipids

Kasiske, B. L., Ma, J. Z., Kalil, R. S. N. & Louis, T., Jan 1995, In : Annals of Internal Medicine. 122, 2, p. 133-141 9 p.

Research output: Contribution to journalReview article

Antihypertensive Agents
Lipids
Serum
LDL Cholesterol
HDL Cholesterol

Healthy worker effect in a longitudinal study of one-second forced expiratory volume (FEV1) and chronic exposure to Granite Dust

Eisen, E. A., Wegman, D. H., Louis, T., Smith, T. J. & Peters, J. M., Dec 1995, In : International Journal of Epidemiology. 24, 6, p. 1154-1162 9 p.

Research output: Contribution to journalArticle

Healthy Worker Effect
Drop out
Longitudinal Study
Granite
Forced Expiratory Volume

Inferences on the association parameter in copula models for bivariate survival data

Shih, J. H. & Louis, T., 1995, In : Biometrics. 51, 4, p. 1384-1399 16 p.

Research output: Contribution to journalArticle

Copula Models
Survival Data
Estimator
Acquired Immunodeficiency Syndrome
Two-stage Estimation

Lipid-lowering therapy in patients with renal disease

Massy, Z. A., Ma, J. Z., Louis, T. & Kasiske, B. L., 1995, In : Kidney International. 48, 1, p. 188-198 11 p.

Research output: Contribution to journalArticle

Hypolipidemic Agents
Kidney
Lipids
LDL Cholesterol
Continuous Ambulatory Peritoneal Dialysis

Long-term Effects of Antihypertensive Agents on Proteinuria and Renal Function

Maki, D. D., Ma, J. Z., Louis, T. & Kasiske, B. L., May 22 1995, In : Archives of Internal Medicine. 155, 10, p. 1073-1080 8 p.

Research output: Contribution to journalArticle

Proteinuria
Antihypertensive Agents
Glomerular Filtration Rate
Blood Pressure
Kidney

Long-term effects of reduced renal mass in humans

Kasiske, B. L., Ma, J. Z., Louis, T. & Swan, S. K., 1995, In : Kidney International. 48, 3, p. 814-819 6 p.

Research output: Contribution to journalArticle

Nephrectomy
Kidney
Blood Pressure
Proteinuria
Glomerular Filtration Rate

Modeling the labeling index distribution: An application of functional data analysis

Grambsch, P. M., Randall, B. L., Bostick, R. M., Potter, J. D. & Louis, T., 1995, In : Journal of the American Statistical Association. 90, 431, p. 813-821 9 p.

Research output: Contribution to journalArticle

Functional Data Analysis
Labeling
Modeling
Curve
Methodology

Survival analysis using a scale change random effects model

Anderson, J. E. & Louis, T., 1995, In : Journal of the American Statistical Association. 90, 430, p. 669-679 11 p.

Research output: Contribution to journalArticle

Survival Analysis
Random Effects Model
Random Effects
Hazard Function
Frailty Model

The authors reply: Simpler common-sense methods may be preferable to “empirical bayes”

Devine, O. J., Louis, T. & Halloran, M. E., 1995, In : Epidemiology. 6, 3, p. 338 1 p.

Research output: Contribution to journalLetter

1994

A constrained empirical bayes estimator for incidence rates in areas with small populations

Devine, O. J. & Louis, T., 1994, In : Statistics in Medicine. 13, 11, p. 1119-1133 15 p.

Research output: Contribution to journalArticle

Empirical Bayes Estimator
Incidence
Empirical Bayes
Population
Mortality

Association between survival time and ordinal covariates

Le, C. T., Grambsch, P. M. & Louis, T., 1994, In : Biometrics. 50, 1, p. 213-219 7 p.

Research output: Contribution to journalArticle

Survival Time
Covariates
Statistics
Ordered Alternatives
Spearman's coefficient

Chronic conditions that lead to functional limitation in the elderly

Boult, C., Kane, R. L., Louis, T., Boult, L. & McCaffrey, D., 1994, In : Journals of Gerontology. 49, 1

Research output: Contribution to journalArticle

Cerebrovascular Disorders
Arthritis
Coronary Artery Disease
Sampling Studies
Aptitude

Comment

Grambsch, P. M., Cowles, M. K. & Louis, T., 1994, In : Statistical Science. 9, 3, p. 398-400 3 p.

Research output: Contribution to journalArticle

Empirical bayes estimators for spatially correlated incidence rates

Devine, O. J., Louis, T. & Halloran, M. E., 1994, In : Environmetrics. 5, 4, p. 381-398 18 p.

Research output: Contribution to journalArticle

Empirical Bayes Estimator
Empirical Bayes
Bayes
Incidence
Bayes Estimate

Empirical bayes methods for stabilizing incidence rates before mapping

Devine, O. J., Louis, T. & Halloran, M. E., 1994, In : Epidemiology. 5, 6, p. 622-630 9 p.

Research output: Contribution to journalReview article

Incidence
Masks
Population

Statistical analysis of proliferative index data in clinical trials

Grambsch, P., Louis, T., Bostick, R. M., Grandits, G. A., Fosdick, L., Darif, M. & Potter, J. D., 1994, In : Statistics in Medicine. 13, 16, p. 1619-1634 16 p.

Research output: Contribution to journalArticle

Clinical Trials
Statistical Analysis
Likelihood
Epithelial Cells
Ancillary Statistic

Survival and Disease Progression According to Gender of Patients With HIV Infection: The Terry Beirn Community Programs for Clinical Research on AIDS

Melnick, S. L., Louis, T., Hillman, D., Sherer, R., Rodriguez, E. M., Korvick, J. A., Deyton, L., Lackman, C., Capps, L., Brown, L. S. & Carlyn, M., Dec 28 1994, In : JAMA: The Journal of the American Medical Association. 272, 24, p. 1915-1921 7 p.

Research output: Contribution to journalArticle

Training the next generation of biostatisticians

Demets, D. L., Anbar, D., Fairweather, W., Louis, T. & O’Neill, R. T., 1994, In : American Statistician. 48, 4, p. 280-284 5 p.

Research output: Contribution to journalArticle

Epidemiology
Expertise
Statistics
Design
Teaching
1993

Calcium and colorectal epithelial cell proliferation: A preliminary randomized, double-blinded, placebo-controlled clinical trial

Bostick, R. M., Potter, J. D., Fosdick, L., Grambsch, P., Lampe, J. W., Wood, J. R., Louis, T., Ganz, R. & Grandits, G., Jan 20 1993, In : Journal of the National Cancer Institute. 85, 2, p. 132-141 10 p.

Research output: Contribution to journalArticle

Cell Proliferation
Controlled Clinical Trials
Cell proliferation
Calcium
Clinical Trials

Meta‐analysis of clinical studies: the whole is greater than the sum of its parts

Louis, T., 1993, In : Transfusion. 33, 9, p. 698-700 3 p.

Research output: Contribution to journalEditorial

Meta-Analysis
Clinical Studies
1992

Comment

Louis, T., 1992, In : Journal of the American Statistical Association. 87, 419, p. 626-628 3 p.

Research output: Contribution to journalComment/debate

Comment

Louis, T., 1992, In : Journal of the American Statistical Association. 87, 418, p. 576-579 4 p.

Research output: Contribution to journalComment/debate

Comment

Louis, T., 1992, In : Statistical Science. 7, 4, p. 450-452 3 p.

Research output: Contribution to journalArticle

Random effects models with non‐parametric priors

Butler, S. M. & Louis, T., 1992, In : Statistics in Medicine. 11, 14-15, p. 1981-2000 20 p.

Research output: Contribution to journalArticle

Nonparametric Maximum Likelihood
Random Effects Model
Random Effects
Standard error
Nonparametric Maximum Likelihood Estimator

Time-dependent association measures for bivariate survival distributions

Anderson, J. E., Louis, T., Holm, N. V. & Harvald, B., 1992, In : Journal of the American Statistical Association. 87, 419, p. 641-650 10 p.

Research output: Contribution to journalArticle

Association Measure
Survival Distribution
Bivariate Distribution
Frailty Model
Frailty
1991

Assessing, accommodating, and interpreting the influences of heterogeneity

Louis, T., 1991, In : Environmental Health Perspectives. 90, p. 215-222 8 p.

Research output: Contribution to journalArticle

Small-Area Analysis
Statistical Models
Measurement errors
Risk assessment
Meta-Analysis

Forecasting the number of future disabled elderly using Markovian and mathematical models

Boult, C., Kane, R. L., Louis, T. & Ibrahim, J. G., 1991, In : Journal of Clinical Epidemiology. 44, 9, p. 973-980 8 p.

Research output: Contribution to journalArticle

Theoretical Models
Health Status
Longitudinal Studies
Morbidity
Mortality

Smoothing the non-parametric estimate of a prior distribution by roughening. A computational study

Laird, N. M. & Louis, T., 1991, In : Computational Statistics and Data Analysis. 12, 1, p. 27-37 11 p.

Research output: Contribution to journalArticle

Empirical Bayes
Prior distribution
Smoothing
Treatment Effects
Empirical Bayes Method

Using empirical bayes methods in biopharmaceutical research

Louis, T., 1991, In : Statistics in Medicine. 10, 6, p. 811-829 19 p.

Research output: Contribution to journalArticle

Empirical Bayes Method
Bayes Theorem
Treatment Effects
Empirical Bayes
Multicenter Studies

Variance components and their implications for statistical information in medical data

Orav, E. J., Louis, T., Palmer, R. H. & Wright, E. A., 1991, In : Statistics in Medicine. 10, 4, p. 599-616 18 p.

Research output: Contribution to journalArticle

Variance Components
Sample Size
Cluster Analysis
Effective Sample Size
Variance Component Model
1990

Controlling error rates using prior information and marginal totals to select tumor sites

Louis, T. & Bailey, J. K., 1990, In : Journal of Statistical Planning and Inference. 24, 3, p. 297-316 20 p.

Research output: Contribution to journalArticle

Prior Information
Error Rate
Bioassay
Tumors
Tumor

Diet, plasma levels of beta-carotene and alpha-tocopherol, and risk of malignant melanoma

Stryker, W. S., Stampfer, M. J., Stein, E. A., Kaplan, L., Louis, T., Sober, A. & Willett, W. C., Apr 1990, In : American Journal of Epidemiology. 131, 4, p. 597-611 15 p.

Research output: Contribution to journalArticle

beta Carotene
alpha-Tocopherol
Melanoma
Diet
Odds Ratio

Longitudinal and cross-sectional estimates of pulmonary function decline in never-smoking adults

Ware, J. H., Dockery, D. W., Louis, T., Xu, X., Ferris, B. G. & Speizer, F. E., Oct 1990, In : American Journal of Epidemiology. 132, 4, p. 685-700 16 p.

Research output: Contribution to journalArticle

Longitudinal Studies
Smoking
Lung
Air Pollution
Appointments and Schedules

Performance quality, gender, and professional role: A study of physicians and nonphysicians in 16 ambulatory care practices

Hall, J. A., Palmer, R. H., John Orav, E., Hargraves, J. L., Wright, E. A. & Louis, T., 1990, In : Medical Care. 28, 6, p. 489-501 13 p.

Research output: Contribution to journalArticle

Professional Role
Ambulatory Care
Physicians
Early Detection of Cancer
Urinary Tract Infections
1989

Analysis of a random sample of 2-year carcinogen bioassays from the nci data base

Louis, T., Feb 1989, In : Toxicological Sciences. 12, 2, p. 222-231 10 p.

Research output: Contribution to journalArticle

Bioassay
Biological Assay
Carcinogens
Databases
Risk assessment

An assessment of publication bias using a sample of published clinical trials

Berlin, J. A., Begg, C. B. & Louis, T., 1989, In : Journal of the American Statistical Association. 84, 406, p. 381-392 12 p.

Research output: Contribution to journalArticle

Publication Bias
Clinical Trials
Sample Size
Treatment Effects
Alternatives

Empirical Bayes confidence intervals for a series of related experiments

Laird, N. M. & Louis, T., 1989, In : Biometrics. 45, 2, p. 481-495 15 p.

Research output: Contribution to journalArticle

Empirical Bayes
Confidence interval
confidence interval
Confidence Intervals
Bootstrap