GRADE Guidelines 30: The GRADE Approach to Assessing the Certainty of Modelled Evidence - an Overview in the Context of Health Decision-making.

• Brozek JL Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster GRADE Centre & Michael DeGroote Cochrane Canada Centre, McMaster University, Hamilton, Ontario, Canada.
• Canelo-Aybar C Department of Paediatrics, Obstetrics and Gynaecology, Preventive Medicine, and Public Health. PhD Programme in Methodology of Biomedical Research and Public Health. Universitat Autònoma de Barcelona, Bellaterra, Spain; Iberoamerican Cochrane Center, Biomedical Research Institute (IIB Sant Pau-CIBERESP), Barcelona, Spain.
• Akl EA Department of Internal Medicine, American University of Beirut, Beirut, Lebanon.
• Bowen JM Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Toronto Health Economics and Technology Assessment (THETA) Collaborative, Toronto, Ontario, Canada.
• Bucher J National Toxicology Program, National Institute of Environmental Health Sciences, Durham, North Carolina, USA.
• Chiu WA Texas A&M University, College Station, Texas, USA.
• Cronin M Liverpool John Moores University, Liverpool, UK.
• Djulbegovic B Center for Evidence-Based Medicine and Health Outcome Research, Morsani College of Medicine, University of South Florida, Tampa, Florida, USA.
• Falavigna M Institute for Education and Research, Hospital Moinhos de Vento, Porto Alegre, Rio Grande do Sul, Brazil.
• Guyatt GH Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster GRADE Centre & Michael DeGroote Cochrane Canada Centre, McMaster University, Hamilton, Ontario, Canada.
• Gordon AA ICF International, Durham, North Carolina, USA.
• Boon MH Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK.
• Hutubessy RCW World Health Organization, Geneva, Switzerland.
• Joore MA Clinical Epidemiology and Medical Technology Assessment, Maastricht University Medical Centre+, Maastricht, the Netherlands.
• Katikireddi V Institute of Health & Wellbeing, University of Glasgow, Glasgow, UK.
• LaKind J LaKind Associates, LLC, Catonsville, Maryland, USA; Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland, USA.
• Langendam M Department of Clinical Epidemiology, Biostatistics, and Bioinformatics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands.
• Manja V Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Surgery, University of California Davis, Sacramento, California, USA; Department of Medicine, Department of Veterans Affairs, Northern California Health Care System, Mather, California, USA.
• Magnuson K ICF International, Durham, North Carolina, USA.
• Mathioudakis AG Division of Infection, Immunity and Respiratory Medicine, University Hospital of South Manchester, University of Manchester, Manchester, UK.
• Meerpohl J Institute for Evidence in Medicine, Medical Center, University of Freiburg, Freiburg-am-Breisgau, Germany; Cochrane Germany, Freiburg-am-Breisgau, Germany.
• Mertz D Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.
• Mezencev R National Center for Environmental Assessment, U.S. Environmental Protection Agency, Washington, D.C., District of Columbia, USA.
• Morgan R Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.
• Morgano GP Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; McMaster GRADE Centre & Michael DeGroote Cochrane Canada Centre, McMaster University, Hamilton, Ontario, Canada.
• Mustafa R Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA.
• O'Flaherty M Institute of Population Health Sciences, University of Liverpool, Liverpool, UK.
• Patlewicz G National Center for Computational Toxicology, U.S. Environmental Protection Agency, Durham, North Carolina, USA.
• Riva JJ McMaster GRADE Centre & Michael DeGroote Cochrane Canada Centre, McMaster University, Hamilton, Ontario, Canada; Department of Family Medicine, McMaster University, Hamilton, Ontario, Canada.
• Posso M Iberoamerican Cochrane Center, Biomedical Research Institute (IIB Sant Pau-CIBERESP), Barcelona, Spain.
• Rooney A National Toxicology Program, National Institute of Environmental Health Sciences, Durham, North Carolina, USA.
• Schlosser PM National Center for Environmental Assessment, U.S. Environmental Protection Agency, Washington, D.C., District of Columbia, USA.
• Schwartz L Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.
• Shemilt I EPPI-Centre, Institute of Education, University College London, London, UK.
• Tarride JE Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Programs for Assessment of Technology in Health, McMaster University, Hamilton, Ontario, Canada.
• Thayer KA Department of Medicine, Department of Veterans Affairs, Northern California Health Care System, Mather, California, USA.
• Tsaioun K Evidence-Based Toxicology Collaboration, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
• Vale L Health Economics Group, Institute of Health and Society, Newcastle University, Newcastle upon Tyne, UK.
• Wambaugh J National Center for Computational Toxicology, U.S. Environmental Protection Agency, Durham, North Carolina, USA.
• Wignall J ICF International, Durham, North Carolina, USA.
• Williams A ICF International, Durham, North Carolina, USA.
• Xie F Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada.
• Zhang Y Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Health Quality Ontario, Toronto, Ontario, Canada.
• Schünemann HJ Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada; Department of Medicine, McMaster University, Hamilton, Ontario, Canada; McMaster GRADE Centre & Michael DeGroote Cochrane Canada Centre, McMaster University, Hamilton, Ontario, Canada.

Epidemiology