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Table 4 Study assessment using the Newcastle Ottawa Scale

From: Major adverse cardiac events and mortality in chronic obstructive pulmonary disease following percutaneous coronary intervention: a systematic review and meta-analysis

Studies

Stars allocated following NOS assessment

No of stars (n)

Almagro 2015

*******

7

Berger 2004

******

6

Campo 2013

********

8

Enriquez 2011

*******

7

Konecny 2010

********

8

Nishiyama 2009

*******

7

Selvaraj 2005

******

6

Sung 2013

******

6

Zhang 2012

******

6

  1. Abbreviations: NOS Newcastle Ottawa scale