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Table 2 Quality assessment according to the Newcastle-Ottawa Scale

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

Study (year)Masaya 1993 [20]Azad 1994 [21]Anastasia 1998 [22]Yoshihiro 2011 [26]Kodai 2016 [23]Matthew 2016 [24]Akira 2017 [25]
Selection5444455
Comparability1111111
Outcome2132222
Total8687788