BMJ 2017; 356 doi: https://doi.org/10.1136/bmj.i6583 (Published 15 February 2017)Cite this as: BMJ 2017;356:i6583
Adrian R Martineau, professor of respiratory infection and immunity1 2,
David A Jolliffe, postdoctoral research fellow1,
Richard L Hooper, reader in medical statistics1,
Lauren Greenberg, medical statistician1,
John F Aloia, professor of medicine3,
Peter Bergman, associate professor4,
Gal Dubnov-Raz, consultant paediatrician5,
Susanna Esposito, professor of paediatrics6,
Davaasambuu Ganmaa, assistant professor7,
Adit A Ginde, professor of emergency medicine8,
Emma C Goodall, assistant professor9,
Cameron C Grant, associate professor10,
Christopher J Griffiths, professor of primary care1 2 11,
Wim Janssens, professor of pneumonology12,
Ilkka Laaksi, chief administrative medical officer13,
Semira Manaseki-Holland, senior clinical lecturer14,
David Mauger, professor of public health sciences and statistics15,
David R Murdoch, professor of pathology16,
Rachel Neale, associate professor17,
Judy R Rees, assistant professor18,
Steve Simpson Jr, postdoctoral research fellow19,
Iwona Stelmach, professor of paediatric allergy20,
Geeta Trilok Kumar, associate professor21,
Mitsuyoshi Urashima, professor of molecular epidemiology22,
Carlos A Camargo Jr, professor of emergency medicine, medicine, and epidemiology23
- Correspondence to: A R Martineau a.martineau@qmul.ac.uk
Abstract
Objectives To assess the overall effect of vitamin D supplementation on risk of acute respiratory tract infection, and to identify factors modifying this effect.
Design Systematic review and meta-analysis of individual participant data (IPD) from randomised controlled trials.