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bradley johnston

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TOP 3
bradley johnston; Joshua Z Goldenberg; Gordon H Guyatt
Probiotics for the Prevention of Clostridium difficile-Associated Diarrhea.
Malgorzata M Bala; Dirk Bassler; Matthias Briel; Jason W Busse; Philipp Dahm; Natalia Diaz-Granados; Elie A Akl; Pablo Alonso-Coello; Douglas G Altman; Basil Hassouneh; bradley johnston; German Malaga; Filip Mejza; Dominik Mertz; Sadeesh K Srinathan; Xin Sun; Per Olav Vandvik; Stephen D Walter; John J You; Gordon H Guyatt
Randomized trials published in higher vs. lower impact journals differ in design, conduct, and analysis.
Gordon H Guyatt; bradley johnston; Paul Karanicolas; Regina Kunz; Lawrence L Kupper; Sandra L Martin; Joerg Meerpohl; Andrew D Oxman; Donald Patrick; Elie A Akl; Pablo Alonso-Coello; Jan Brozek; Robin Christensen; Toshi A Furukawa; Kristian Thorlund; Gunn E Vist; Stephen D Walter; Holger Schunemann
GRADE guidelines: 13. Preparing summary of findings tables and evidence profiles-continuous outcomes.

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All Publications

2013: bradley johnston; Joshua Z Goldenberg; Gordon H Guyatt
Probiotics for the Prevention of Clostridium difficile-Associated Diarrhea.
Annals of internal medicine 2013;158(9):706-7.
2013: Malgorzata M Bala; Dirk Bassler; Matthias Briel; Jason W Busse; Philipp Dahm; Natalia Diaz-Granados; Elie A Akl; Pablo Alonso-Coello; Douglas G Altman; Basil Hassouneh; bradley johnston; German Malaga; Filip Mejza; Dominik Mertz; Sadeesh K Srinathan; Xin Sun; Per Olav Vandvik; Stephen D Walter; John J You; Gordon H Guyatt
Randomized trials published in higher vs. lower impact journals differ in design, conduct, and analysis.
Journal of clinical epidemiology 2013;66(3):286-95.
2013: Gordon H Guyatt; bradley johnston; Paul Karanicolas; Regina Kunz; Lawrence L Kupper; Sandra L Martin; Joerg Meerpohl; Andrew D Oxman; Donald Patrick; Elie A Akl; Pablo Alonso-Coello; Jan Brozek; Robin Christensen; Toshi A Furukawa; Kristian Thorlund; Gunn E Vist; Stephen D Walter; Holger Schunemann
GRADE guidelines: 13. Preparing summary of findings tables and evidence profiles-continuous outcomes.
Journal of clinical epidemiology 2013;66(2):173-83.
2013: Elie A Akl; Pablo Alonso-Coello; Matthias Briel; Deborah J Cook; Shanil Ebrahim; bradley johnston; Ignacio Neumann; Gordon H Guyatt
Addressing dichotomous data for participants excluded from trial analysis: a guide for systematic reviewers.
PloS one 2013;8(2):e57132.
2012: bradley johnston; Mark Loeb; Stephanie S Y Ma; Kristian Thorlund; Per O Vandvik; Joshua Z Goldenberg; Gordon H Guyatt
Probiotics for the prevention of Clostridium difficile-associated diarrhea: a systematic review and meta-analysis.
Annals of internal medicine 2012;157(12):878-88.
2012: Bruno R da Costa; Armin Gemperli; Gordon H Guyatt; bradley johnston; Eveline Nüesch; Stephan Reichenbach; Anne W S Rutjes; Thomy Tonia; Peter Jüni
Methods to convert continuous outcomes into odds ratios of treatment response and numbers needed to treat: meta-epidemiological study.
International journal of epidemiology 2012;41(5):1445-59.
2012: bradley johnston; Kristian Thorlund; Bruno R da Costa; Toshi A Furukawa; Gordon H Guyatt
New methods can extend the use of minimal important difference units in meta-analyses of continuous outcome measures.
Journal of clinical epidemiology 2012;65(8):817-26.
2012: Per Olav Vandvik; John You; Qi Zhou; Elie A Akl; Linn Brandt; Jan Brozek; bradley johnston; Julia E Kreis; Sohail Mulla; Nancy Santesso; Holger J Schünemann; Frederick A Spencer; Gordon Guyatt
Formatting modifications in GRADE evidence profiles improved guideline panelists comprehension and accessibility to information. A randomized trial.
Journal of clinical epidemiology 2012;65(7):748-55.
2012: Ian P Sinha; Rosalind L Smyth; Peter Tugwell; Mark Turner; Johanna H van der Lee; Paula R Williamson; Ornella Della Casa Alberighi; Douglas G Altman; Michael W Beresford; Maarten Boers; Mike Clarke; Jonathan Craig; Ricardo M Fernandes; Lisa Hartling; bradley johnston; Andrew Lux; Martin Offringa; Amy C Plint
Standard 5: selection, measurement, and reporting of outcomes in clinical trials in children.
Pediatrics 2012;129 Suppl 3():S146-52.
2012: Elie A Akl; Mohamad Alshurafa; Dirk Bassler; Matthias Briel; Jason W Busse; Diane Heels-Ansdell; bradley johnston; Christina M Katsios; Francois Lamontagne; Ed Mills; Sohail Mulla; Xin Sun; Claudio Vera; John J You; Qi Zhou; Gordon H Guyatt
Specific instructions for estimating unclearly reported blinding status in randomized trials were reliable and valid.
Journal of clinical epidemiology 2012;65(3):262-7.
2012: Kristian Thorlund; Michael Walsh; Tahany Awad; Philip J Devereaux; Christian Gluud; Georgina Imberger; bradley johnston; Lehana Thabane; Jørn Wetterslev
Evolution of heterogeneity (I2) estimates and their 95% confidence intervals in large meta-analyses.
PloS one 2012;7(7):e39471.
2012: Elie A Akl; Mohamad Alshurafa; Douglas G Altman; Dirk Bassler; Matthias Briel; Jason W Busse; Deborah J Cook; Tali Cukierman-Yaffe; Azim Gangji; bradley johnston; Christina M Katsios; Francois Lamontagne; Edward J Mills; Sohail Mulla; Holger J Schünemann; Xin Sun; Claudio Vera; Stephen D Walter; John J You; Qi Zhou; Gordon H Guyatt
Potential impact on estimated treatment effects of information lost to follow-up in randomised controlled trials (LOST-IT): systematic review.
BMJ (Clinical research ed.) 2012;344():e2809.
2012: Xin Sun; Per Olav Vandvik; Stephen D Walter; John J You; Basil Hassouneh; Diane Heels-Ansdell; bradley johnston; German Malaga; Filip Mejza; Dominik Mertz; Sadeesh K Srinathan; Elie A Akl; Pablo Alonso-Coello; Douglas G Altman; Malgorzata M Bala; Dirk Bassler; Neera Bhatnagar; Matthias Briel; Jason W Busse; Philipp Dahm; Natalia Diaz-Granados; Gordon H Guyatt
Credibility of claims of subgroup effects in randomised controlled trials: systematic review.
BMJ (Clinical research ed.) 2012;344():e1553.
2011: bradley johnston; Xin Sun; Per Olav Vandvik; Joshua Z Goldenberg; Gordon H Guyatt
Probiotics for the prevention of pediatric antibiotic-associated diarrhea.
Cochrane database of systematic reviews (Online) 2011;(11):CD004827.
2011: Xin Sun; Matthias Briel; Jason W Busse; John J You; Elie A Akl; Filip Mejza; Malgorzata M Bala; Dirk Bassler; Dominik Mertz; Natalia Diaz-Granados; Per Olav Vandvik; German Malaga; Sadeesh K Srinathan; Philipp Dahm; bradley johnston; Pablo Alonso-Coello; Basil Hassouneh; Jessica Truong; Neil D Dattani; Stephen D Walter; Diane Heels-Ansdell; Neera Bhatnagar; Douglas G Altman; Gordon H Guyatt
The influence of study characteristics on reporting of subgroup analyses in randomised controlled trials: systematic review.
BMJ (Clinical research ed.) 2011;342():d1569.
2010: bradley johnston; Larissa Shamseer; Bruno R da Costa; Ross T Tsuyuki; Sunita Vohra
Measurement issues in trials of pediatric acute diarrheal diseases: a systematic review.
Pediatrics 2010;126(1):e222-31.
2010: bradley johnston; Kristian Thorlund; Holger J Schünemann; Feng Xie; Mohammad Hassan Murad; Victor M Montori; Gordon H Guyatt
Improving the interpretation of quality of life evidence in meta-analyses: the application of minimal important difference units.
Health and quality of life outcomes 2010;8():116.
2010: Marianne J Botting; Edoye O Porbeni; Michel R Joffres; bradley johnston; Robert E Black; Edward J Mills
Water and sanitation infrastructure for health: The impact of foreign aid.
Globalization and health 2010;6():12.
2009: Ben Vandermeer; Liza Bialy; Nicola Hooton; Lisa Hartling; Terry P Klassen; bradley johnston; Natasha Wiebe
Meta-analyses of safety data: a comparison of exact versus asymptotic methods.
Statistical methods in medical research 2009;18(4):421-32.
2009: Xin Sun; Matthias Briel; Jason W Busse; Elie A Akl; John J You; Filip Mejza; Malgorzata Bala; Natalia Diaz-Granados; Dirk Bassler; Dominik Mertz; Sadeesh K Srinathan; Per Olav Vandvik; German Malaga; Mohamed Alshurafa; Philipp Dahm; Pablo Alonso-Coello; Diane M Heels-Ansdell; Neera Bhatnagar; bradley johnston; Li Wang; Stephen D Walter; Douglas Altman; Gordon H Guyatt
Subgroup Analysis of Trials Is Rarely Easy (SATIRE): a study protocol for a systematic review to characterize the analysis, reporting, and claim of subgroup effects in randomized trials.
Trials 2009;10():101.
2009: Elie A Akl; Matthias Briel; John J You; Francois Lamontagne; Azim Gangji; Tali Cukierman-Yaffe; Mohamad Alshurafa; Xin Sun; Kara A Nerenberg; bradley johnston; Claudio Vera; Edward J Mills; Dirk Bassler; Arturo Salazar; Neera Bhatnagar; Jason W Busse; Zara Khalid; Sd Walter; Deborah J Cook; Holger J Schünemann; Douglas Altman; Gordon H Guyatt
LOST to follow-up Information in Trials (LOST-IT): a protocol on the potential impact.
Trials 2009;10():40.
2008: Sunita Vohra; bradley johnston; Keri L Laycock; William K Midodzi; Indra Dhunnoo; Evan Harris; Lola Baydala
Safety and tolerability of North American ginseng extract in the treatment of pediatric upper respiratory tract infection: a phase II randomized, controlled trial of 2 dosing schedules.
Pediatrics 2008;122(2):e402-10.
2008: Gideon Koren; Jean-Jacques Dugoua; Laura Magee; Sunita Vohra; Doreen Matsui; Anick Bérard; bradley johnston; Myla Moretti; Adrienne Einarson
MotherNature: establishing a Canadian research network for natural health products (NHPs) during pregnancy and lactation.
Journal of alternative and complementary medicine (New York, N.Y.) 2008;14(4):369-72.
2008: bradley johnston; Bruno R da Costa; P J Devereaux; Elie A Akl; Jason W Busse
The use of expertise-based randomized controlled trials to assess spinal manipulation and acupuncture for low back pain: a systematic review.
Spine 2008;33(8):914-8.
2007: Bruno R da Costa; bradley johnston
Surgical versus nonsurgical treatment for back pain.
The New England journal of medicine 2007;357(12):1255; author reply 1255-6.
2007: bradley johnston; Alison L Supina; M Ospina; Sunita Vohra
Probiotics for the prevention of pediatric antibiotic-associated diarrhea.
Cochrane database of systematic reviews (Online) 2007;(2):CD004827.
2007: Sunita Vohra; bradley johnston; Kristie Cramer; Kim Humphreys
Adverse events associated with pediatric spinal manipulation: a systematic review.
Pediatrics 2007;119(1):e275-83.
2006: Daniel Roth; bradley johnston; Sunita Vohra
Which medications used in paediatric practice have demonstrated natural health product-drug interactions?: Part B: Clinical commentary.
Paediatrics & child health 2006;11(10):673-4.
2006: bradley johnston; Sunita Vohra
Which medications used in paediatric practice have demonstrated natural health product-drug interactions?: Part A: Evidence-based answer and summary.
Paediatrics & child health 2006;11(10):671-2.
2006: bradley johnston; Sunita Vohra
Investigator-initiated trials are more impartial.
Nature 2006;443(7108):144.
2006: bradley johnston; Alison L Supina; Sunita Vohra
Probiotics for pediatric antibiotic-associated diarrhea: a meta-analysis of randomized placebo-controlled trials.
CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne 2006;175(4):377-83.
2005: Edward Mills; Ping Wu; bradley johnston; Keith Gallicano; Mike Clarke; Gordon Guyatt
Natural health product-drug interactions: a systematic review of clinical trials.
Therapeutic drug monitoring 2005;27(5):549-57.
2005: bradley johnston; Ping Wu; Edward Mills
Herb-drug interaction implications in pediatric practice: an overview of pharmacokinetic trials.
Archives of pediatrics & adolescent medicine 2005;159(7):692.
2005: bradley johnston; Sunita Vohra
Does Lactobacillus GG prevent antibiotic-associated diarrhea in children?: Part B: Clinical commentary.
Paediatrics & child health 2005;10(3):170-1.
2005: bradley johnston; Kristie Cramer; Sunita Vohra
Does Lactobacillus GG prevent antibiotic-associated diarrhea in children?: Part A: Evidence-based answer and summary.
Paediatrics & child health 2005;10(3):169-71.
2005: bradley johnston; Sunita Vohra
Treating C. difficile.
CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne 2005;172(4):447-8.
2005: Sunita Vohra; Kymm Feldman; bradley johnston; Kellie Waters; Heather Boon
Integrating complementary and alternative medicine into academic medical centers: experience and perceptions of nine leading centers in North America.
BMC health services research 2005;5():78.
2004: bradley johnston; Edward Mills
n-of-1 randomized controlled trials: an opportunity for complementary and alternative medicine evaluation.
Journal of alternative and complementary medicine (New York, N.Y.) 2004;10(6):979-84.