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Table 1 Description of included studies

From: Hospitalisation and mortality in patients with comorbid COPD and heart failure: a systematic review and meta-analysis

Study Characteristics N = 28
Year of Publication
 1980–19900
 1991–20000
 2001–20106
 2011–201822
Geographic Region
 Africa0
 Asia2
 Australia/New Zealand0
 Europe12
 Multi-continent2
 North America12
 South America0
 Not Reported0
Setting
 Single Centre6
 Multicentre (one country)1
 Multicentre (multi-country)2
 Database19
Duration of Follow-Up
  < 1 year5
  ≥ 1 and < 2 years5
  ≥ 2 and < 3 years3
  ≥ 3 years9
 Not Reported6