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Table 1 Descriptions of included studies

From: Open-chest cardiopulmonary resuscitation versus closed-chest cardiopulmonary resuscitation in patients with cardiac arrest: a systematic review and meta-analysis

Study (year)Country/ Study periodStudy designAge (y)Cause of arrest (n)ROSCaSurvival to discharge
Masaya (1993) [20]Not available (1986.1–1992.11)A Prospective observational study≥18Non-trauma:26Non-trauma:6915/2621/693/261/69
Azad (1994) [21]American (1987.7–1991.7)A retrospective study<18trauma:15trauma:123/152/12  
Anastasia (1998) [22]Greece (1993.12–1996.3)A Prospective observational study≥18trauma:16trauma:1314/1613/13  
Yoshihiro (2011) [26]Japan (2001–2011)A Case series observational study<18 And ≥18trauma:407trauma:70130/40731/70  
Kodai (2016) [23]Japan (2004.1–2012.12)A retrospective cohort study≥18trauma:484trauma:893  9/48484/893
Matthew (2016) [24]American (2014.4–2014.12)A Prospective observational study≥18trauma:16trauma:174/167/17  
Akira (2017) [25]Japan (2004.1–2015.12)A retrospective cohort study≥18trauma:2192trauma:4318  40/2192156/4318
  1. a Return of spontaneous circulation;
  2. b Open-chest cardiopulmonary resuscitation;
  3. c Closed-chest cardiopulmonary resuscitation