Table 1 Variability of COPD symptom prevalence in different studies

Miravitlles et al. COPD 2016 [25]

n = 727

Any symptoms

81.4

82.7

63.0

Stephenson et al. Int J Chron Obstruct Pulmon Dis. 2015 [27]

n = 1239

Any symptoms

78.6

n.r.

65.9

Bateman et al. Respir Res. 2015 [29]

n = 3394

Any symptoms

94.4

n.r.

88.3

Roche et al. COPD 2013 [18]

n = 1489

Any symptoms

39.8^a

97

58

Partridge et al. Curr Med Res Opin. 2009 [17]

n = 803

Worse symptoms^b

37

34

25