1. Videolaryngoscopy versus direct laryngoscopy for adult patients requiring tracheal intubation: a Cochrane Systematic Review†  
S.R. Lewis, A.R. Butler, J. Parker, T.M. Cook, O.J. Schofield-Robinson, A.F. Smith 
British Journal of Anaesthesia 
Volume 119, Issue 3, Pages (September 2017)
DOI: /bja/aex228
Copyright © 2017 The Author(s) Terms and Conditions

2. Fig 1 Flow chart of search strategy.
British Journal of Anaesthesia  , DOI: ( /bja/aex228)
Copyright © 2017 The Author(s) Terms and Conditions

3. Fig 2
Risk of bias graph. Review authors' judgments about each risk of bias item presented as percentages across all included studies.
British Journal of Anaesthesia  , DOI: ( /bja/aex228)
Copyright © 2017 The Author(s) Terms and Conditions

4. Fig 3
Comparison: videolaryngoscope (experimental) vs Macintosh (control). Outcome: failed intubation.
British Journal of Anaesthesia  , DOI: ( /bja/aex228)
Copyright © 2017 The Author(s) Terms and Conditions

5. Fig 4
Subgroup analysis. Comparison: videolaryngoscope vs Macintosh. Outcome: failed intubation by scope.
British Journal of Anaesthesia  , DOI: ( /bja/aex228)
Copyright © 2017 The Author(s) Terms and Conditions

6. Fig 5
Subgroup analysis. Comparison: videolaryngoscope vs Macintosh. Outcome: failed intubation by airway difficulty.
British Journal of Anaesthesia  , DOI: ( /bja/aex228)
Copyright © 2017 The Author(s) Terms and Conditions