Works by Petkau, John

Results: 66

On a life testing problem involving the two parameter exponential distribution.

Published in:

Communications in Statistics: Theory & Methods, 1979, v. 8, n. 15, p. 1523, doi. 10.1080/03610927908827848

By:

John Petkau, J.

Publication type:

Article

Exact slopes fot a life testing problem involving the two parameter exponential distribution.

Published in:

Communications in Statistics: Theory & Methods, 1979, v. 8, n. 15, p. 1511, doi. 10.1080/03610927908827847

By:

John Petkau, A.

Publication type:

Article

Long-Term Natural History of Severe Asthma Exacerbations and Their Impact on the Disease Course.

Published in:

2022

By:

Tae Yoon Lee;
Petkau, John;
Sadatsafavi, Mohsen;
Lee, Tae Yoon

Publication type:

journal article

Interferon Beta and Long-term Disability in Multiple Sclerosis.

Published in:

JAMA Neurology, 2013, v. 70, n. 5, p. 651, doi. 10.1001/jamaneurol.2013.2197

By:

Shirani, Afsaneh;
Yinshan Zhao;
Karim, Mohammad Ehsanul;
Evans, Charity;
Kingwell, Elaine;
van der Kop, Mia L.;
Oger, Joel;
Gustafson, Paul;
Petkau, John;
Tremlett, Helen

Publication type:

Article

Application of hidden Markov models to multiple sclerosis lesion count data.

Published in:

Statistics in Medicine, 2005, v. 24, n. 15, p. 2335, doi. 10.1002/sim.2108

By:

Altman, Rachel MacKay;
Petkau, A. John

Publication type:

Article

SURVEILLANCE OF CLUSTERING NEAR POINT SOURCES.

Published in:

Statistics in Medicine, 1996, v. 15, n. 7-9, p. 727, doi. 10.1002/(SICI)1097-0258(19960415)15:7/9<727::AID-SIM244>3.0.CO;2-X

By:

LE, NHU D.;
PETKAU, A. JOHN;
ROSYCHUK, RHONDA

Publication type:

Article

Association between beta-interferon exposure and hospital events in multiple sclerosis.

Published in:

Pharmacoepidemiology & Drug Safety, 2014, v. 23, n. 11, p. 1213, doi. 10.1002/pds.3667

By:

Evans, Charity;
Zhu, Feng;
Kingwell, Elaine;
Shirani, Afsaneh;
Kop, Mia L.;
Petkau, John;
Gustafson, Paul;
Zhao, Yinshan;
Oger, Joel;
Tremlett, Helen

Publication type:

Article

Sequential medical trials involving paired data.

Published in:

Biometrika, 1981, v. 68, n. 1, p. 119

By:

CHERNOFF, HERMAN;
PETKAU, A. JOHN

Publication type:

Article

Frequentist properties of three stopping rules for comparative clinical trials.

Published in:

Biometrika, 1980, v. 67, n. 3, p. 690

By:

PETKAU, A. JOHN

Publication type:

Article

Sequential testing of the equality of two survival distributions using the modified Savage statistic.

Published in:

Biometrika, 1978, v. 65, n. 3, p. 615

By:

KOZIOL, JAMES A.;
PETKAU, A. JOHN

Publication type:

Article

Sample-size calculations for short-term proof-of-concept studies of tissue protection and repair in multiple sclerosis lesions via conventional clinical imaging.

Published in:

Multiple Sclerosis Journal, 2015, v. 21, n. 13, p. 1693, doi. 10.1177/1352458515569098

By:

Reich, Daniel S.;
White, Richard;
Cortese, Irene C. M.;
Vuolo, Luisa;
Shea, Colin D.;
Collins, Tassie L.;
Petkau, John

Publication type:

Article

Further investigation of safety monitoring guidelines based on magnetic resonance imaging lesion activity in multiple sclerosis clinical trials.

Published in:

Multiple Sclerosis Journal, 2015, v. 21, n. 1, p. 101, doi. 10.1177/1352458514533846

By:

Dong, Jing;
Zhao, Yinshan;
Petkau, A John;
Li, David KB;
Riddehough, Andrew;
Traboulsee, Anthony

Publication type:

Article

Natural, innate improvements in multiple sclerosis disability.

Published in:

Multiple Sclerosis Journal, 2012, v. 18, n. 10, p. 1412, doi. 10.1177/1352458512439119

By:

Tremlett, Helen;
Zhu, Feng;
Petkau, John;
Oger, Joel;
Zhao, Yinshan

Publication type:

Article

Neutralizing antibodies to interferon beta-1b multiple sclerosis: a clinico-radiographic paradox in the BEYOND trial.

Published in:

Multiple Sclerosis Journal, 2012, v. 18, n. 2, p. 181, doi. 10.1177/1352458511418629

By:

Goodin, Douglas S;
Hartung, Hans-Peter;
O’Connor, Paul;
Filippi, Massimo;
Arnason, Barry;
Comi, Giancarlo;
Cook, Stuart;
Jeffery, Douglas;
Kappos, Ludwig;
Bogumil, Timon;
Knappertz, Volker;
Sandbrink, Rupert;
Beckmann, Karola;
White, Rick;
Petkau, John;
Pohl, Christoph

Publication type:

Article

Detection of Unusual Increases in MRI Lesion Counts in Individual Multiple Sclerosis Patients.

Published in:

Journal of the American Statistical Association, 2014, v. 109, n. 505, p. 119, doi. 10.1080/01621459.2013.847373

By:

Zhao, Yinshan;
Li, David K. B.;
Petkau, A. John;
Riddehough, Andrew;
Traboulsee, Anthony

Publication type:

Article

Air Pollution and Daily Mortality in a City with Low Levels of Pollution.

Published in:

Environmental Health Perspectives, 2003, v. 111, n. 1, p. 45, doi. 10.1289/ehp.5276

By:

Vedal, Sverre;
Brauer, Michael;
White, Richard;
Petkau, John

Publication type:

Article

Non‐parametric inference on calibration of predicted risks.

Published in:

Statistics in Medicine, 2024, v. 43, n. 18, p. 3524, doi. 10.1002/sim.10138

By:

Sadatsafavi, Mohsen;
Petkau, John

Publication type:

Article

Adjusting for differential misclassification in matched case-control studies utilizing health administrative data.

Published in:

2019

By:

Högg, Tanja;
Zhao, Yinshan;
Gustafson, Paul;
Petkau, John;
Fisk, John;
Marrie, Ruth Ann;
Tremlett, Helen

Publication type:

journal article

Bayesian analysis of pair-matched case-control studies subject to outcome misclassification.

Published in:

2017

By:

Högg, Tanja;
Petkau, John;
Zhao, Yinshan;
Gustafson, Paul;
Wijnands, José MA;
Tremlett, Helen

Publication type:

journal article

Identification of treatment responders based on multiple longitudinal outcomes with applications to multiple sclerosis patients.

Published in:

2017

By:

Kondo, Yumi;
Zhao, Yinshan;
Petkau, John

Publication type:

journal article

Recommendations from the national multiple sclerosis society clinical outcomes assessment task force.

Published in:

Annals of Neurology, 1997, v. 42, n. 3, p. 379, doi. 10.1002/ana.410420318

By:

Rudick, Richard;
Antel, Jack;
Confavreux, Christian;
Cutter, Gary;
Ellison, George;
Fischer, Jill;
Lublin, Fred;
Miller, Aaron;
Petkau, John;
Rao, Stephen;
Reingold, Stephen;
Syndulko, Karl;
Thompson, Alan;
Wallenberg, Joy;
Weinshenker, Brian;
Willoughby, Ernest

Publication type:

Article

Clinical outcomes assessment in multiple sclerosis.

Published in:

Annals of Neurology, 1996, v. 40, n. 3, p. 469, doi. 10.1002/ana.410400321

By:

Rudick, Richard;
Fischer, Jill;
Antel, Jack;
Confavreux, Christian;
Cutter, Gary;
Ellison, George;
Lublin, Fred;
Miller, Aaron;
Petkau, John;
Rao, Stephen;
Reingold, Stephen;
Syndulko, Karl;
Thompson, Alan;
Wallenberg, Joy;
Weinshenker, Brain;
Willoughby, Ernest

Publication type:

Article

Association between the use of selective serotonin reuptake inhibitors and multiple sclerosis disability progression.

Published in:

Pharmacoepidemiology & Drug Safety, 2016, v. 25, n. 10, p. 1150, doi. 10.1002/pds.4031

By:

Zhang, Tingting;
Kingwell, Elaine;
De Jong, Hilda JI;
Zhu, Feng;
Zhao, Yinshan;
Carruthers, Robert;
Petkau, John;
Gustafson, Paul;
Oger, Joel;
Tremlett, Helen

Publication type:

Article

Seasonal confounding and residual correlation in analyses of health effects of air pollution.

Published in:

Environmetrics, 2007, v. 18, n. 4, p. 375, doi. 10.1002/env.814

By:

Ghement, Isabella R.;
Heckman, Nancy E.;
Petkau, A. John

Publication type:

Article

The effect of truncation on a sequential test for the drift of brownian motion.

Published in:

Sequential Analysis, 1989, v. 8, n. 2, p. 169, doi. 10.1080/07474948908836175

By:

Bather, John A.;
Chernoff, Herman;
John Petkau, A.

Publication type:

Article

Multiple Sclerosis in Older Adults: The Clinical Profile and Impact of Interferon Beta Treatment.

Published in:

BioMed Research International, 2015, v. 2015, p. 1, doi. 10.1155/2015/451912

By:

Shirani, Afsaneh;
Zhao, Yinshan;
Petkau, John;
Gustafson, Paul;
Karim, Mohammad Ehsanul;
Evans, Charity;
Kingwell, Elaine;
van der Kop, Mia L.;
Oger, Joel;
Tremlett, Helen

Publication type:

Article

On the application of statistical learning approaches to construct inverse probability weights in marginal structural Cox models: Hedging against weight-model misspecification.

Published in:

Communications in Statistics: Simulation & Computation, 2017, v. 46, n. 10, p. 7668, doi. 10.1080/03610918.2016.1248574

By:

Karim, Mohammad Ehsanul;
Petkau, John;
Gustafson, Paul;
Tremlett, Helen;
Group, The Beams Study

Publication type:

Article

Development of a multiple sclerosis functional composite as a clinical trial outcome measure.

Published in:

Brain: A Journal of Neurology, 1999, v. 122, n. 5, p. 871, doi. 10.1093/brain/122.5.871

By:

Cutter, Gary R.;
Baier, Monika L.;
Rudick, Richard A.;
Cookfair, Diane L.;
Fischer, Jill S.;
Petkau, John;
Syndulko, Karl;
Weinshenker, Brian G.;
Antel, Jack P.;
Confavreux, Christian;
Ellison, George W.;
Lublin, Fred;
Miller, Aaron E.;
Rao, Stephen M.;
Reingold, Stephen;
Thompson, Alan;
Willoughby, Ernest

Publication type:

Article

Predictors of disease activity in 857 patients with MS treated with interferon beta-1b.

Published in:

Journal of Neurology, 2015, v. 262, n. 11, p. 2466, doi. 10.1007/s00415-015-7862-9

By:

Hartung, Hans-Peter;
Kappos, Ludwig;
Goodin, Douglas;
O'Connor, Paul;
Filippi, Massimo;
Arnason, Barry;
Comi, Giancarlo;
Cook, Stuart;
Jeffery, Douglas;
Petkau, John;
White, Richard;
Bogumil, Timon;
Beckmann, Karola;
Stemper, Brigitte;
Suarez, Gustavo;
Sandbrink, Rupert;
Pohl, Christoph

Publication type:

Article

S13.1: Bayesian prediction of the number of lesions in multiple sclerosis trials.

Published in:

Biometrical Journal, 2004, v. 46, p. 27, doi. 10.1002/bimj.200490228

By:

Held, Ulrike;
Li, David;
Barkhof, Frederik;
Petkau, John

Publication type:

Article

Longitudinal analyses for magnetic resonance imaging outcomes in multiple sclerosis clinical trials.

Published in:

Journal of Biopharmaceutical Statistics, 1997, v. 7, n. 4, p. 501, doi. 10.1080/10543409708835204

By:

D'yachkova, Yulia;
Petkau, John;
Whtie, Rick

Publication type:

Article

Magnetic Resonance Imaging (MRI) As an Outcome Measure in Multiple Sclerosis.

Published in:

Neurorehabilitation & Neural Repair, 1993, v. 7, n. 3/4, p. 117, doi. 10.1177/136140969300700306

By:

Paty, Donald W.;
Koopmans, Robert A.;
Zhao, GuoJun;
Li, David K.B.;
Oger, Joel J.F.;
Petkau, John

Publication type:

Article

THE AUTHORS REPLY.

Published in:

American Journal of Epidemiology, 2016, v. 184, n. 11, p. 857, doi. 10.1093/aje/kww158

By:

Ehsanul Karim, Mohammad;
Gustafson, Paul;
Petkau, John;
Tremlett, Helen

Publication type:

Article

Comparison of Statistical Approaches for Dealing With Immortal Time Bias in Drug Effectiveness Studies.

Published in:

American Journal of Epidemiology, 2016, v. 184, n. 4, p. 325, doi. 10.1093/aje/kwv445

By:

Karim, Mohammad Ehsanul;
Gustafson, Paul;
Petkau, John;
Tremlett, Helen

Publication type:

Article

Marginal Structural Cox Models for Estimating the Association Between β-Interferon Exposure and Disease Progression in a Multiple Sclerosis Cohort.

Published in:

American Journal of Epidemiology, 2014, v. 180, n. 2, p. 160, doi. 10.1093/aje/kwu125

By:

Karim, Mohammad Ehsanul;
Gustafson, Paul;
Petkau, John;
Zhao, Yinshan;
Shirani, Afsaneh;
Kingwell, Elaine;
Evans, Charity;
van der Kop, Mia;
Oger, Joel;
Tremlett, Helen

Publication type:

Article

Marginal Structural Cox Models for Estimating the Association Between β-Interferon Exposure and Disease Progression in a Multiple Sclerosis Cohort.

Published in:

2014

By:

Karim, Mohammad Ehsanul;
Gustafson, Paul;
Petkau, John;
Zhao, Yinshan;
Shirani, Afsaneh;
Kingwell, Elaine;
Evans, Charity;
van der Kop, Mia;
Oger, Joel;
Tremlett, Helen

Publication type:

Journal Article

Overdispersed poisson regression models for studies of air pollution and human health.

Published in:

Canadian Journal of Statistics, 1994, v. 22, n. 4, p. 421, doi. 10.2307/3315402

By:

McNeney, Brad;
Petkau, John

Publication type:

Article

A regression model with random effects for beer chemistry and Canadians' beer preferences.

Published in:

Canadian Journal of Statistics, 1990, v. 18, n. 2, p. 108, doi. 10.2307/3315559

By:

Li, Bing;
Petkau, A. John

Publication type:

Article

The variability of rainfall acidity revisited.

Published in:

Canadian Journal of Statistics, 1988, v. 16, n. 1, p. 15, doi. 10.2307/3315061

By:

Nhu Le, D.;
Petkau, A. John

Publication type:

Article

Truncated sequential medical trials involving paired data.

Published in:

Canadian Journal of Statistics, 1987, v. 15, n. 4, p. 363, doi. 10.2307/3315255

By:

Petkau, A. John

Publication type:

Article

Relative efficiencies of goodness-of-fit procedures with truncated data.

Published in:

Canadian Journal of Statistics, 1984, v. 12, n. 2, p. 107, doi. 10.2307/3315175

By:

Koziol, James A.;
John Petkau, A.

Publication type:

Article

Longitudinal analyses of the effects of neutralizing antibodies on interferon beta-1b in relapsing-remitting multiple sclerosis.

Published in:

Multiple Sclerosis (13524585), 2004, v. 10, n. 2, p. 126, doi. 10.1191/1352458504ms1004oa

By:

Petkau, A. John;
White, Richard A.;
Ebers, George C.;
Reder, Anthony T.;
Sibley, William A.;
Lublin, Fred D.;
Paty, Donald W.

Publication type:

Article

Model-Based ROC Curve: Examining the Effect of Case Mix and Model Calibration on the ROC Plot.

Published in:

Medical Decision Making, 2022, v. 42, n. 4, p. 487, doi. 10.1177/0272989X211050909

By:

Sadatsafavi, Mohsen;
Saha-Chaudhuri, Paramita;
Petkau, John

Publication type:

Article

Objective Criteria for In-vitro Responses in Human Tumor Colony-forming Assays.

Published in:

Medical Decision Making, 1988, v. 8, n. 4, p. 304, doi. 10.1177/0272989X8800800411

By:

Koziol, James A.;
Petkau, A. John;
Taetle, Raymond

Publication type:

Article

A flexible mixed-effect negative binomial regression model for detecting unusual increases in MRI lesion counts in individual multiple sclerosis patients.

Published in:

Statistics in Medicine, 2015, v. 34, n. 13, p. 2165, doi. 10.1002/sim.6484

By:

Kondo, Yumi;
Zhao, Yinshan;
Petkau, John

Publication type:

Article

A longitudinal model for magnetic resonance imaging lesion count data in multiple sclerosis patients.

Published in:

Statistics in Medicine, 2012, v. 31, n. 5, p. 449, doi. 10.1002/sim.4394

By:

MacKay Altman, Rachel;
Petkau, A. John;
Vrecko, Dean;
Smith, Alex

Publication type:

Article

Letters to the Editor.

Published in:

1978

By:

Norusis, Maruja J.;
Van Eck, Neal;
Montanelli Jr., Richard G.;
Wilkinson, Leland;
Dallal, Gerard E.;
Petkau, John

Publication type:

Letter

Exposure of chronic obstructive pulmonary disease patients to particles: Respiratory and cardiovascular health effects.

Published in:

Journal of Exposure Analysis & Environmental Epidemiology, 2001, v. 11, n. 6, p. 490, doi. 10.1038/sj.jea.7500195

By:

BRAUER, MICHAEL;
EBELT, STEFANIE T;
FISHER, TERI V;
BRUMM, JOCHEN;
PETKAU, A JOHN;
VEDAL, SVERRE

Publication type:

Article

Nonparametric Two-Sample Comparisions of Changes on Ordinal Responses.

Published in:

Journal of the American Statistical Association, 1999, v. 94, n. 447, p. 970, doi. 10.1080/01621459.1999.10474201

By:

Bajorski, Peter;
Petkau, John

Publication type:

Article

A Comparison of n Estimators for the Binomial Distribution.

Published in:

1981

By:

Olkin, Ingram;
Petkau, A. John;
Zidek, James V.

Publication type:

Course Review