Vernon Farewell

Vernon Farewell

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Vernon Farewell

Vernon Farewell

Publications by authors named "Vernon Farewell"

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Partially hidden multi-state modelling of a prolonged disease state defined by a composite outcome.

Lifetime Data Anal 2019 Jan 19. Epub 2019 Jan 19.

MRC Biostatistics Unit, School of Clinical Medicine, University of Cambridge, Robinson Way, Cambridge, CB2 0SR, UK.

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http://dx.doi.org/10.1007/s10985-018-09460-yDOI Listing
January 2019

Correlated multistate models for multiple processes: an application to renal disease progression in systemic .

J R Stat Soc Ser C Appl Stat 2018 Aug 8;67(4):841-860. Epub 2018 Jan 8.

University of Cambridge, UK.

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http://dx.doi.org/10.1111/rssc.12257DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6517283PMC
August 2018

Trivariate mover-stayer counting process models for investigating joint damage in psoriatic arthritis.

Stat Med 2016 12 8;35(30):5701-5716. Epub 2016 Aug 8.

MRC Biostatistics Unit, Cambridge, CB2 0SR, U.K.

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http://doi.wiley.com/10.1002/sim.7074
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http://dx.doi.org/10.1002/sim.7074DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5157786PMC
December 2016

A corrected formulation for marginal inference derived from two-part mixed models for longitudinal semi-continuous data.

Stat Methods Med Res 2016 10 6;25(5):2014-2020. Epub 2013 Nov 6.

Medical Research Council Biostatistics Unit, Institute of Public Health, Cambridge, UK.

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http://dx.doi.org/10.1177/0962280213509798DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5051603PMC
October 2016

Study design.

Diagn Histopathol (Oxf) 2016 Jul;22(7):246-252

Programme Leader, MRC Biostatistics Unit, Cambridge Institute of Public Health, Cambridge, UK. Conflicts of interest: None.

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https://linkinghub.elsevier.com/retrieve/pii/S17562317163006
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http://dx.doi.org/10.1016/j.mpdhp.2016.06.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4983654PMC
July 2016

Multiple Imputation of Missing Composite Outcomes in Longitudinal Data.

Stat Biosci 2016 5;8(2):310-332. Epub 2016 Apr 5.

MRC Biostatistics Unit, Cambridge Institute of Public Health, Forvie Site, Robinson Way, Cambridge Biomedical Campus, Cambridge, CB2 0SR UK.

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http://link.springer.com/10.1007/s12561-016-9146-z
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http://dx.doi.org/10.1007/s12561-016-9146-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5035329PMC
April 2016

On Modelling Minimal Disease Activity.

Arthritis Care Res (Hoboken) 2016 Mar;68(3):388-93

MRC Biostatistics Unit, Cambridge Institute of Public Health, Cambridge University, Cambridge, UK.

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http://dx.doi.org/10.1002/acr.22687DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4949508PMC
March 2016

Psychosocial Factors Associated With Withdrawal From the United Kingdom Collaborative Trial of Ovarian Cancer Screening After 1 Episode of Repeat Screening.

Int J Gynecol Cancer 2015 Oct;25(8):1519-25

*Sussex Health Outcomes Research & Education in Cancer (SHORE-C), University of Sussex, Brighton, East Sussex, UK; †Public Health and Primary Care, University of Cambridge, Cambridge, UK; ‡Women's Cancer, Institute for Women's Health, University College London, London, UK; §Chancellery Building, UNSW, Sydney NSW, Australia; and ∥MRC Biostatistics Unit, Institute of Public Health, Cambridge, UK.

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http://dx.doi.org/10.1097/IGC.0000000000000507DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4582418PMC
October 2015

Birmingham SLE cohort: outcomes of a large inception cohort followed for up to 21 years.

Rheumatology (Oxford) 2015 May 15;54(5):836-43. Epub 2014 Oct 15.

Department of Rheumatology, Doncaster and Bassetlaw Hospitals NHS Foundation Trust, Doncaster, MRC Biostatistics Unit, University of Cambridge, Cambridge, UK, Rheumatology Research Group, University of Birmingham, Department of Rheumatology, Sandwell and West Birmingham NHS Trust and Department of Rheumatology, Queen Elizabeth Hospital Birmingham, Birmingham, UK.

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http://dx.doi.org/10.1093/rheumatology/keu412DOI Listing
May 2015

Validation of the Toronto Psoriatic Arthritis Screen Version 2 (ToPAS 2).

J Rheumatol 2015 May 1;42(5):841-6. Epub 2015 Apr 1.

From the MRC Biostatistics Unit, UK Institute of Public Health, Cambridge, UK; the Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital; Division of Dermatology, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada.B.D. Tom, PhD, MRC Biostatistics Unit, UK Institute of Public Health; V. Chandran, MBBS, MD, DM, PhD, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital; V.T. Farewell, PhD, MRC Biostatistics Unit, UK Institute of Public Health; C.F. Rosen, MD, FRCPC, Division of Dermatology, Toronto Western Hospital, University of Toronto; D.D. Gladman, MD, FRCPC, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital.

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http://www.jrheum.org/cgi/doi/10.3899/jrheum.140857
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http://dx.doi.org/10.3899/jrheum.140857DOI Listing
May 2015

A likelihood-based two-part marginal model for longitudinal semicontinuous data.

Stat Methods Med Res 2015 Apr 25;24(2):194-205. Epub 2011 Aug 25.

Medical Research Council Biostatistics Unit, Institute of Public Health, University Forvie Site, Cambridge, UK.

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http://journals.sagepub.com/doi/10.1177/0962280211414620
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http://dx.doi.org/10.1177/0962280211414620DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4849555PMC
April 2015

The versatility of multi-state models for the analysis of longitudinal data with unobservable features.

Lifetime Data Anal 2014 Jan 6;20(1):51-75. Epub 2012 Dec 6.

MRC Biostatistics Unit, Institute of Public Health, Robinson Way, Cambridge, CB2 0SR, UK,

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http://link.springer.com/10.1007/s10985-012-9236-2
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http://dx.doi.org/10.1007/s10985-012-9236-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3884139PMC
January 2014

Dirichlet negative multinomial regression for overdispersed correlated count data.

Biostatistics 2013 Apr 5;14(2):395-404. Epub 2012 Dec 5.

Cochrane Institute of Primary Care and Public Health, Cardiff University, Neuadd Meirionnydd, Heath Park, Cardiff CF14 4YS, UK.

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http://dx.doi.org/10.1093/biostatistics/kxs050DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3590929PMC
April 2013

Mixture distributions in multi-state modelling: some considerations in a study of psoriatic arthritis.

Stat Med 2013 Feb 26;32(4):600-19. Epub 2012 Jul 26.

MRC Biostatistics Unit, Cambridge, U.K.

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http://dx.doi.org/10.1002/sim.5529DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3575696PMC
February 2013

The BILAG2004-Pregnancy index is reliable for assessment of disease activity in pregnant SLE patients.

Rheumatology (Oxford) 2012 Oct 4;51(10):1877-80. Epub 2012 Jul 4.

Department of Rheumatology, Doncaster Royal Infirmary, Armthorpe Road, Doncaster DN2 5LT, UK.

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http://dx.doi.org/10.1093/rheumatology/kes158DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3448883PMC
October 2012

Screening for cognitive impairment in systemic lupus erythematosus.

J Rheumatol 2012 Jul 1;39(7):1371-7. Epub 2012 Jun 1.

Division of Rheumatology, Nova Scotia Rehabilitation Centre, 2nd Floor, 1341 Summer Street, Halifax, Nova Scotia B3H 4K4, Canada..

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http://dx.doi.org/10.3899/jrheum.111504DOI Listing
July 2012

Longitudinal study of the bidirectional association between pain and depressive symptoms in patients with psoriatic arthritis.

Arthritis Care Res (Hoboken) 2012 May;64(5):758-65

University of Waterloo, Waterloo, Ontario, Canada.

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http://doi.wiley.com/10.1002/acr.21602
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http://dx.doi.org/10.1002/acr.21602DOI Listing
May 2012

Intermittent observation of time-dependent explanatory variables: a multistate modelling approach.

Stat Med 2011 Dec 4;30(30):3520-31. Epub 2011 Dec 4.

MRC Biostatistics Unit, Institute of Public Health, Robinson Way, Cambridge CB2 0SR, UK.

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http://doi.wiley.com/10.1002/sim.4429
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http://dx.doi.org/10.1002/sim.4429DOI Listing
December 2011

A case-study in the clinical epidemiology of psoriatic arthritis: multistate models and causal arguments.

J R Stat Soc Ser C Appl Stat 2011 Nov;60(5):675-699

Medical Research Council Biostatistics Unit Cambridge, UK.

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http://dx.doi.org/10.1111/j.1467-9876.2011.01021.xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3258416PMC
November 2011

Inflammation in an individual joint predicts damage to that joint in psoriatic arthritis.

Ann Rheum Dis 2011 Feb 27;70(2):305-8. Epub 2010 Oct 27.

MRC Biostatistics Unit, Cambridge, UK.

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http://dx.doi.org/10.1136/ard.2010.135087DOI Listing
February 2011

A multistate model for events defined by prolonged observation.

Biostatistics 2011 Jan 25;12(1):102-11. Epub 2010 Jun 25.

MRC Biostatistics Unit, Institute of Public Health, University Forvie Site, Robinson Way, Cambridge CB2 0SR, UK.

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http://dx.doi.org/10.1093/biostatistics/kxq041DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3006122PMC
January 2011

Clinical trials: planning and analysis.

Endocr Dev 2010 3;18:1-22. Epub 2010 Jun 3.

MRC Biostatistics Unit, Institute of Public Health, Cambridge, Cambridge, UK.

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http://dx.doi.org/10.1159/000316124DOI Listing
December 2010

Informing response criteria for psoriatic arthritis (PsA). II: Further considerations and a proposal--the PsA joint activity index.

J Rheumatol 2010 Dec 15;37(12):2559-65. Epub 2010 Oct 15.

University Health Network, Toronto Western Hospital, Toronto, Ontario, Canada.

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http://dx.doi.org/10.3899/jrheum.100479DOI Listing
December 2010

Numerical scoring for the BILAG-2004 index.

Rheumatology (Oxford) 2010 Sep 24;49(9):1665-9. Epub 2010 Feb 24.

Rheumatology Research Group, School of Immunity and Infection, College of Medical and Dental Sciences, The Medical School, University of Birmingham, Birmingham B15 2TT, UK.

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http://dx.doi.org/10.1093/rheumatology/keq026DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2919194PMC
September 2010

Informing response criteria for psoriatic arthritis. I: discrimination models based on data from 3 anti-tumor necrosis factor randomized studies.

J Rheumatol 2010 Sep 1;37(9):1892-7. Epub 2010 Jul 1.

Toronto Western Hospital, 399 Bathurst Street, 1E410B, Toronto, Ontario M5T 2S8, Canada.

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http://dx.doi.org/10.3899/jrheum.091172DOI Listing
September 2010

Longitudinal analysis of fatigue in psoriatic arthritis.

J Rheumatol 2010 Sep 1;37(9):1878-84. Epub 2010 Jul 1.

Department of Health Studies and Gerontology, University of Waterloo, Waterloo, Canada.

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http://dx.doi.org/10.3899/jrheum.100179DOI Listing
September 2010

Axial psoriatic arthritis: update on a longterm prospective study.

J Rheumatol 2009 Dec 2;36(12):2744-50. Epub 2009 Nov 2.

Division of Rheumatology, University of Toronto, Toronto Western Hospital, Toronto, Ontario, Canada.

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http://dx.doi.org/10.3899/jrheum.090412DOI Listing
December 2009

Bias in 2-part mixed models for longitudinal semicontinuous data.

Biostatistics 2009 Apr 8;10(2):374-89. Epub 2009 Jan 8.

Medical Research Council, Biostatistics Unit, Robinson Way, Cambridge CB2 0SR, UK.

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http://dx.doi.org/10.1093/biostatistics/kxn044DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2648907PMC
April 2009

Comments on "A hierarchical zero-inflated log-normal model for skewed responses".

Stat Methods Med Res 2009 Feb;18(1):107-8; discussion 108-9

MRC Biostatistics Unit, University Forvie Site, Robinson Way, Cambridge CB2 0SR, UK.

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http://dx.doi.org/10.1177/0962280208101988DOI Listing
February 2009

Changing patterns in mortality and disease outcomes for patients with systemic lupus erythematosus.

J Rheumatol 2008 Nov 15;35(11):2152-8. Epub 2008 Sep 15.

Toronto Western Hospital, Centre for Prognosis Studies in Rheumatic Diseases, Toronto Western Hospital, University Health Network, Toronto, Canada.

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November 2008

Prevalence of malignancy in psoriatic arthritis.

Arthritis Rheum 2008 Jan;58(1):82-7

University of Toronto, Toronto, Ontario, Canada.

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http://dx.doi.org/10.1002/art.23185DOI Listing
January 2008

Improved survival in psoriatic arthritis with calendar time.

Arthritis Rheum 2007 Aug;56(8):2708-14

University of Toronto, and Toronto Western Hospital, Toronto, Ontario, Canada.

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http://dx.doi.org/10.1002/art.22800DOI Listing
August 2007

Predictors for radiological damage in psoriatic arthritis: results from a single centre.

Ann Rheum Dis 2007 Mar 17;66(3):370-6. Epub 2006 Aug 17.

MRC Biostatistics Unit, Institute of Public Health, Cambridge, UK.

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http://dx.doi.org/10.1136/ard.2006.056457DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1856017PMC
March 2007

A note on robust inference from a conditional Poisson model.

Biom J 2006 Feb;48(1):117-30

Centro de Investigación en Matemáticas, Guanajuato, México.

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February 2006

Reporting of mortality in a psoriatic arthritis clinic is primarily a function of the number of clinic contacts and not disease severity.

J Rheumatol 2005 Dec;32(12):2364-7

MRC Biostatistics Unit, Institute of Public Health, Cambridge, UK.

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December 2005

HLA markers for susceptibility and expression in scleroderma.

J Rheumatol 2005 Aug;32(8):1481-7

Centre for Prognosis Studies in the Rheumatic Diseases, University Health Network, Toronto Western Hospital, Ontario, Canada.

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August 2005

Longitudinal cohort studies.

J Rheumatol Suppl 2005 Jan;72:30-2

University of Toronto, Toronto Western Research Institute, Psoriatic Arthritis Program UHN, Toronto, Canada.

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January 2005

Defining response in systemic lupus erythematosus: a study by the Systemic Lupus International Collaborating Clinics group.

J Rheumatol 2004 Dec;31(12):2390-4

Division of Rheumatology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.

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December 2004

Studies of attrition in rheumatological databases.

J Rheumatol 2004 Jul;31(7):1244-5

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July 2004

HLA is a candidate region for psoriatic arthritis. evidence for excessive HLA sharing in sibling pairs.

Hum Immunol 2003 Sep;64(9):887-9

Department of Medicine, University of Toronto, Toronto, Ontario, Canada.

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September 2003

HLA studies in psoriatic arthritis: current situation and future needs.

J Rheumatol 2003 Jan;30(1):4-6

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January 2003