1. The Lancet Respiratory Medicine
RETRACTED: Effect of early versus late or no tracheostomy on mortality of critically ill patients receiving mechanical ventilation: a systematic review and meta-analysis 
Dr Ilias I Siempos, MD, Theodora K Ntaidou, MD, Filippos T Filippidis, MD, Prof Augustine M K Choi, MD 
The Lancet Respiratory Medicine 
DOI: /S (14)
Copyright © 2014 Elsevier Ltd Terms and Conditions

2. Figure 1 Study flow diagram
Made in accordance with the Preferred Reporting Items of Systematic Reviews and Meta-Analyses (PRISMA) statement with modifications. *The appendix provides reference information about the 175 excluded articles and details of searches in scientific conference proceedings.
The Lancet Respiratory Medicine DOI: ( /S (14) )
Copyright © 2014 Elsevier Ltd Terms and Conditions

3. Figure 2 Mortality in the intensive care unit and early tracheostomy
We calculated pooled odds ratio and 95% CIs with a random-effects model. Total refers to number of patients assigned to each group.
The Lancet Respiratory Medicine DOI: ( /S (14) )
Copyright © 2014 Elsevier Ltd Terms and Conditions

4. Figure 3 Pneumonia and early tracheostomy
We calculated pooled odds ratio and 95% CIs with a random-effects model. Total refers to number of patients assigned to each group.
The Lancet Respiratory Medicine DOI: ( /S (14) )
Copyright © 2014 Elsevier Ltd Terms and Conditions

5. Figure 4 1-year mortality and early tracheostomy
We calculated pooled risk ratio and 95% CIs with a random-effects model. Total refers to number of patients assigned to each group.
The Lancet Respiratory Medicine DOI: ( /S (14) )
Copyright © 2014 Elsevier Ltd Terms and Conditions