Steven A Julious

Steven A Julious

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Steven A Julious

Steven A Julious

Publications by authors named "Steven A Julious"

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Progression criteria in trials with an internal pilot: an audit of publicly funded randomised controlled trials.

Trials 2019 Aug 9;20(1):493. Epub 2019 Aug 9.

School of Health and Related Research, University of Sheffield, Regent Court, Regent Street, Sheffield, S1 4DA, UK.

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http://dx.doi.org/10.1186/s13063-019-3578-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6688224PMC
August 2019

Calculation of confidence intervals for a finite population size.

Authors:
Steven A Julious

Pharm Stat 2019 01 8;18(1):115-122. Epub 2018 Nov 8.

Medical Statistics Group, School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, S1 4DA, UK.

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http://doi.wiley.com/10.1002/pst.1901
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http://dx.doi.org/10.1002/pst.1901DOI Listing
January 2019

A study of target effect sizes in randomised controlled trials published in the Health Technology Assessment journal.

Trials 2018 Oct 10;19(1):544. Epub 2018 Oct 10.

Sheffield Clinical Trials Unit, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1186/s13063-018-2886-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180439PMC
October 2018

Choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial - the development of the DELTA guidance.

Trials 2018 Oct 10;19(1):542. Epub 2018 Oct 10.

Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Botnar Research Centre, Nuffield Orthopaedic Centre, Windmill Rd, Oxford, OX3 7LD, UK.

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http://dx.doi.org/10.1186/s13063-018-2887-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180499PMC
October 2018

Are pilot trials useful for predicting randomisation and attrition rates in definitive studies: A review of publicly funded trials.

Clin Trials 2018 04 23;15(2):189-196. Epub 2018 Jan 23.

2 School of Health and Related Research (ScHARR), The University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1177/1740774517752113DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5894808PMC
April 2018

Guidance for using pilot studies to inform the design of intervention trials with continuous outcomes.

Clin Epidemiol 2018 18;10:153-157. Epub 2018 Jan 18.

Medical Statistics Group, Design, Trials and Statistics, School of Health and Related Research (ScHARR), University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.2147/CLEP.S146397DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5779280PMC
January 2018

Can emergency medicine research benefit from adaptive design clinical trials?

Emerg Med J 2017 Apr 28;34(4):243-248. Epub 2016 Oct 28.

Health Services Research, School of Health and Related Research, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1136/emermed-2016-206046DOI Listing
April 2017

Corrections: The disagreeable behaviour of the kappa statistic.

Pharm Stat 2017 Jan 2;16(1):95. Epub 2016 Dec 2.

Medical Statistics Group, ScHARR, University of Sheffield, Sheffield, England.

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http://dx.doi.org/10.1002/pst.1795DOI Listing
January 2017

Automated telephone communication systems for preventive healthcare and management of long-term conditions.

Cochrane Database Syst Rev 2016 12 14;12:CD009921. Epub 2016 Dec 14.

Centre for Population Health Sciences (CePHaS), Lee Kong Chian School of Medicine, Nanyang Technological University, 3 Fusionopolis Link, #06-13, Nexus@one-north, Singapore, Singapore, 138543.

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http://dx.doi.org/10.1002/14651858.CD009921.pub2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463821PMC
December 2016

Practical guide to sample size calculations: an introduction.

Pharm Stat 2016 Jan-Feb;15(1):68-74. Epub 2015 Nov 20.

Medical Statistics Group, University of Sheffield, Sheffield, England.

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http://dx.doi.org/10.1002/pst.1709DOI Listing
October 2016

Practical guide to sample size calculations: superiority trials.

Pharm Stat 2016 Jan-Feb;15(1):75-9. Epub 2015 Nov 20.

Medical Statistics Group, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1002/pst.1718DOI Listing
October 2016

Practical guide to sample size calculations: non-inferiority and equivalence trials.

Pharm Stat 2016 Jan-Feb;15(1):80-9. Epub 2015 Nov 25.

Medical Statistics Group, The University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1002/pst.1716DOI Listing
October 2016

Estimating the sample size for a pilot randomised trial to minimise the overall trial sample size for the external pilot and main trial for a continuous outcome variable.

Stat Methods Med Res 2016 06 19;25(3):1057-73. Epub 2015 Jun 19.

Medical Statistics Group, Design, Trials and Statistics Group, School of Health and Related Research, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1177/0962280215588241DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4876429PMC
June 2016

Pilot Studies in clinical research.

Authors:
Steven A Julious

Stat Methods Med Res 2016 06;25(3):995-6

University of Sheffield, UK

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http://dx.doi.org/10.1177/0962280216651022DOI Listing
June 2016

Adaptive designs undertaken in clinical research: a review of registered clinical trials.

Trials 2016 Mar 19;17(1):150. Epub 2016 Mar 19.

ScHARR, University of Sheffield, 30 Regent Street, Sheffield, S1 4DA, UK.

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http://dx.doi.org/10.1186/s13063-016-1273-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4799596PMC
March 2016

The disagreeable behaviour of the kappa statistic.

Pharm Stat 2015 Jan-Feb;14(1):74-8. Epub 2014 Dec 3.

Medical Statistics Group, University of Sheffield, Sheffield, England.

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http://dx.doi.org/10.1002/pst.1659DOI Listing
September 2015

Missing steps in a staircase: a qualitative study of the perspectives of key stakeholders on the use of adaptive designs in confirmatory trials.

Trials 2015 Sep 28;16:430. Epub 2015 Sep 28.

Department of Mathematics and Statistics, University of Reading, Whiteknights, Reading, RG6 6AX, UK.

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http://dx.doi.org/10.1186/s13063-015-0958-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4587783PMC
September 2015

Estimating effect sizes for health-related quality of life outcomes.

Stat Methods Med Res 2014 Oct 19;23(5):430-9. Epub 2013 Feb 19.

University of Sheffield, Sheffield, England.

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http://dx.doi.org/10.1177/0962280213476379DOI Listing
October 2014

A survey of birth order status of students studying for medical degree at the University of Sheffield.

JRSM Open 2014 Sep 11;5(9):2054270414533327. Epub 2014 Aug 11.

Medical Statistics Group, ScHARR, University of Sheffield, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1177/2054270414533327DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4207295PMC
September 2014

The analysis of the use of 'unascertained' for sudden unexpected deaths in infancy from 1988 to 2010.

Arch Dis Child 2014 Mar 21;99(3):300-1. Epub 2013 Nov 21.

Medical Statistics Group, ScHARR, University of Sheffield, , Sheffield, UK.

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http://dx.doi.org/10.1136/archdischild-2013-305196DOI Listing
March 2014

The statistical interpretation of pilot trials: should significance thresholds be reconsidered?

BMC Med Res Methodol 2014 Mar 20;14:41. Epub 2014 Mar 20.

Medical Statistics Group, School of Health and Related Research (ScHARR), University of Sheffield, 30 Regent Street, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1186/1471-2288-14-41DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3994566PMC
March 2014

An investigation of the impact of futility analysis in publicly funded trials.

Trials 2014 Feb 17;15:61. Epub 2014 Feb 17.

Medical Statistics Group, School of Health and Related Research, University of Sheffield, 30 Regent Court, Regent Street, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1186/1745-6215-15-61DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3945066PMC
February 2014

An audit of sample sizes for pilot and feasibility trials being undertaken in the United Kingdom registered in the United Kingdom Clinical Research Network database.

BMC Med Res Methodol 2013 Aug 20;13:104. Epub 2013 Aug 20.

Medical Statistics Group, School of Health and Related Research (ScHARR), University of Sheffield, Regent Court, Regent Street, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1186/1471-2288-13-104DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3765378PMC
August 2013

A reinvestigation of recruitment to randomised, controlled, multicenter trials: a review of trials funded by two UK funding agencies.

Trials 2013 Jun 9;14:166. Epub 2013 Jun 9.

Medical Statistics Group, School of Health and Related Research, University of Sheffield, 30 Regent Court, Regent Street, Sheffield S1 4DA, UK.

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http://trialsjournal.biomedcentral.com/articles/10.1186/1745
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http://dx.doi.org/10.1186/1745-6215-14-166DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3691846PMC
June 2013

Sample sizes for trials involving multiple correlated must-win comparisons.

Pharm Stat 2012 Mar-Apr;11(2):177-85. Epub 2012 Mar 1.

University of Sheffield-Medical Statistics Group, Health Services Research, ScHARR University of Sheffield, Regent Court, 30 Regent Steet, Sheffield, Yorkshire S14DA, United Kingdom.

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http://dx.doi.org/10.1002/pst.515DOI Listing
July 2012

Meta-analysis in clinical research.

Authors:
Steven A Julious

Stat Methods Med Res 2013 Apr;22(2):115-6

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http://dx.doi.org/10.1177/0962280213482391DOI Listing
April 2013

Influence of adaptive analysis on unnecessary patient recruitment: reanalysis of the RATPAC trial.

Ann Emerg Med 2012 Oct 25;60(4):442-8.e1. Epub 2012 May 25.

Biostatistics Department, University of Liverpool, Liverpool, England.

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http://dx.doi.org/10.1016/j.annemergmed.2012.03.032DOI Listing
October 2012

Tutorial in biostatistics: sample sizes for parallel group clinical trials with binary data.

Stat Med 2012 Oct 19;31(24):2904-36. Epub 2012 Jun 19.

University of Sheffield, 30 Regent Court, Regent Street, Sheffield, England, S1 4DA.

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http://dx.doi.org/10.1002/sim.5381DOI Listing
October 2012

Environmental triggers of hospital admissions for school-age children with asthma in two British cities.

Emerg Med J 2012 Oct;29(10):844-5

Medical Statistics Group, ScHARR, University of Sheffield, Sheffield, UK.

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http://emj.bmj.com/lookup/doi/10.1136/emermed-2011-114546
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http://dx.doi.org/10.1136/emermed-2011-114546DOI Listing
October 2012

Sample sizes for trials involving multiple correlated must-win comparisons.

Pharm Stat 2012 Mar-Apr;11(2):177-85. Epub 2012 Mar 1.

University of Sheffield-Medical Statistics Group, Health Services Research, ScHARR University of Sheffield, Regent Court, 30 Regent Steet, Sheffield, Yorkshire S14DA, United Kingdom.

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http://dx.doi.org/10.1002/pst.515DOI Listing
July 2012

The ABC of non-inferiority margin setting from indirect comparisons.

Authors:
Steven A Julious

Pharm Stat 2011 Sep-Oct;10(5):448-53. Epub 2011 Sep 16.

Medical Statistics Group, Health Services Research, University of Sheffield, Regent Court, 30 Regent Street, Sheffield, S1 4DA, England.

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http://dx.doi.org/10.1002/pst.517DOI Listing
June 2012

Time to end the non-inferiority complex?

Authors:
Steven A Julious

Pharm Stat 2011 Sep-Oct;10(5):393-4. Epub 2011 Sep 16.

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http://dx.doi.org/10.1002/pst.519DOI Listing
June 2012

Seven useful designs.

Authors:
Steven A Julious

Pharm Stat 2012 Jan-Feb;11(1):24-31. Epub 2011 May 5.

Medical Statistics Group, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1002/pst.485DOI Listing
May 2012

Investigating the assumption of homogeneity of treatment effects in clinical studies with application to meta-analysis.

Pharm Stat 2012 Jan-Feb;11(1):49-56. Epub 2011 Dec 2.

Medical Statistics Group, ScHARR, University of Sheffield, Sheffield, UK.

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http://doi.wiley.com/10.1002/pst.494
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http://dx.doi.org/10.1002/pst.494DOI Listing
May 2012

Investigating variability in patient response to treatment--a case study from a replicate cross-over study.

Stat Methods Med Res 2011 Dec 25;20(6):657-66. Epub 2010 Aug 25.

Department of Statistics, University of Glasgow, Glasgow, UK.

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http://smm.sagepub.com/content/early/2010/08/23/096228021037
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http://smm.sagepub.com/cgi/doi/10.1177/0962280210379174
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http://dx.doi.org/10.1177/0962280210379174DOI Listing
December 2011

A comparison of methods for sample size estimation for non-inferiority studies with binary outcomes.

Stat Methods Med Res 2011 Dec 1;20(6):595-612. Epub 2010 Oct 1.

Medical Statistics Group, Health Services Research, University of Sheffield, Regent Court, 30 Regent Street, Sheffield, S1 4DA, UK.

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http://dx.doi.org/10.1177/0962280210378945DOI Listing
December 2011

Statistical issues in drug development.

Authors:
Steven A Julious

Stat Methods Med Res 2011 Dec;20(6):577-8

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http://dx.doi.org/10.1177/0962280211419739DOI Listing
December 2011

The potential for bias in reporting of industry-sponsored clinical trials.

Pharm Stat 2011 Jan-Feb;10(1):74-9

Pfizer Ltd, Clinical Research, Sandwich, Kent, UK.

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http://dx.doi.org/10.1002/pst.429DOI Listing
May 2011

Best practice for statisticians in industry sponsored trials.

BMJ 2011 Mar 15;342:d1636. Epub 2011 Mar 15.

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http://dx.doi.org/10.1136/bmj.d1636DOI Listing
March 2011

Issues with using baseline in last observation carried forward analysis.

Pharm Stat 2008 Apr-Jun;7(2):142-6

Medical Statistics Group, University of Sheffield, Sheffield, UK.

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http://dx.doi.org/10.1002/pst.311DOI Listing
July 2008

Are hospital league tables calculated correctly?

Public Health 2007 Dec 7;121(12):902-4; discussion 905-8. Epub 2007 Sep 7.

Medical Statistics Group, University of Sheffield, Regent Court, 30 Regent Street, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1016/j.puhe.2006.06.021DOI Listing
December 2007

Sample size calculations for clinical studies allowing for uncertainty about the variance.

Pharm Stat 2006 Jan-Mar;5(1):29-37

Medical Statistics Group, Health Services Research, University of Sheffield, Regent Court, 30 Regent Street, Sheffield S1 4DA, UK.

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http://dx.doi.org/10.1002/pst.197DOI Listing
July 2007

Predicting where future means will lie based on the results of the current trial.

Contemp Clin Trials 2007 Jul 30;28(4):352-7. Epub 2007 Jan 30.

Medical Statistics Group, School of Health and Related Research, University of Sheffield, Regent Court, 30 Regent Street, Sheffield S1 4DA, United Kingdom.

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http://dx.doi.org/10.1016/j.cct.2007.01.010DOI Listing
July 2007

Issues with number needed to treat.

Authors:
Steven A Julious

Stat Med 2005 Oct;24(20):3233-5

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http://dx.doi.org/10.1002/sim.2150DOI Listing
October 2005

Sample sizes for clinical trials with normal data.

Authors:
Steven A Julious

Stat Med 2004 Jun;23(12):1921-86

Institute of General Practice and Community Care, Community Science Centre, Northern General Hospital, Herries Road, Sheffield, S5 7AU, U.K.

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http://dx.doi.org/10.1002/sim.1783DOI Listing
June 2004