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Table 1 Characteristics of Included Studies

From: Digital chest drainage system versus traditional chest drainage system after pulmonary resection: a systematic review and meta-analysis

Studies Year Country Number of patients Study design Study quality
Digital Traditional
Takamochi 2017 Japan 135 164 RCT High (5)
Waele 2017 Canada 53 50 RCT High (5)
Miller 2016 USA 20 40 POS S3; C1; O3
Shoji 2016 Japan 112 121 ROS S3; C1; O3
Filosso 2015 Italy 40 40 POS S3; C1; O3
Gilbert 2015 Canada 87 85 RCT High (5)
Pompili 2014 International 191 190 RCT High (5)
Brunelli 2009 Italy 82 77 RCT High (4)
  1. RCT randomized control trial, ROS retrospective observational study, POS prospective observational study