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Table 2 Assessment of quality and reliability of the individual studies

From: Endotracheal intubation to reduce aspiration events in acutely comatose patients: a systematic review

Study Section A: Are the results of the study valid? Section B: What are the results? Section C: Will the results help locally?
Did the study address a focused issue? Was the cohort recruited acceptably? Was the exposure accurately measured to minimize bias? Was the outcome accurately measured to minimize bias? Have the authors identified all-important confounding factors? Was the follow up of subjects complete enough? Have ethical issues been taken into consideration? Was the data analysis sufficiently rigorous? Is there a clear statement of findings? How valuable is the research?
Non-traumatic patients
Donald [16] 2009 Yes Yes Uncertain Yes Uncertain Yes Yes Yes Yes High
Duncan [8] 2009 Yes Yes Uncertain Yes Uncertain Yes Yes Yes Yes High
Eizadi-Mood [17] 2009 Yes Uncertain Uncertain Uncertain Uncertain Yes Yes Yes Yes Moderate
Montassier [18] 2012 Yes Yes Uncertain No Uncertain Uncertain Uncertain Uncertain Yes Low
Nielsen6 2012 Yes Yes Uncertain No No Yes Yes Yes Yes Low
Dietze [19] 2014 Yes Uncertain Uncertain Yes Uncertain Yes Yes Yes Yes Low
Van Helmond [20]
2019
Yes Yes Uncertain Yes Uncertain Yes Yes Yes Yes Moderate
Trauma patients
Davis [21] 2005 Yes Yes Uncertain Yes No Yes Yes Yes Uncertain Moderate
Irvin [11] 2010 Yes Uncertain Uncertain Uncertain Uncertain Yes Yes Yes Yes Moderate
Evans [22] 2011 Yes Uncertain Uncertain Yes Uncertain Yes Yes Yes Yes Moderate
Emami [23] 2019 Yes Uncertain Uncertain Yes Uncertain Yes Yes Yes Yes Moderate
Adult Mixed cases
Steuerwald [24] 2018 Yes Uncertain Uncertain Yes Uncertain Yes Yes Yes Yes Moderate
Pediatric Mixed cases
Tweed [12] 2018 Uncertain Uncertain No Uncertain Uncertain Yes Yes Uncertain Yes Low