Skip to main content

Table 1 Study population characteristics

From: Diagnosis of chronic obstructive pulmonary disease in lung cancer screening Computed Tomography scans: independent contribution of emphysema, air trapping and bronchial wall thickening

Characteristic

Mean ± SD or Number (%)

N = 1140

Age, years

62.5 ± 5.2

Body mass index, kg/m2

27.1 ± 3.6

Smoking status

 

 Current smoker

609 (53.4)

 Former smokers

531 (46.6)

Packyears *

38 (28 – 49)

COPD †

437 (38.3)

 Mild disease ‡

277 (63.4)

 Moderate disease §

135 (30.9)

 Severe disease ll

25 (5.7)

  1. * Data presented as median (25th – 75th percentile); † COPD is defined as FEV1/FVC < 70%; ‡ FEV1(% predicted) ≥80%; § 80% > FEV1(% predicted) ≥ 50%; ll 50% > FEV1 (% predicted) ≥ 30%;
  2. FEV1 = forced expiratory volume in one second; FEV1/FVC = ratio of forced expiratory volume in one second over forced vital capacity.
Back to article page

Respiratory Research

ISSN: 1465-993X

Contact us