Skip to main content

Table 2 Selected characteristics of the construction workers

From: Association of genes of protease-antiprotease balance pathway to lung function and emphysema subtypes

  Mean (SD) or N (%)
Age, years 63.2 (7.3)
Male sex 935 (98.3%)
Smoking history  
  Never smoker 135 (14.2%)
  Ex-smoker 595 (62.6%)
  Current smoker 221 (23.2%)
  Pack years 20.4 (16.7)
Years of asbestos exposure (n = 943) 23.9 (10.7)
Emphysema score (n = 352 * ) 2.00 (2.38)
  Centrilobular (n = 228) 1.23 (1.01)
  Paraseptal (n = 170) 1.00 (0.91)
  Panlobular (n = 168) 0.93 (0.87)
  Bullae (n = 126) 0.70 (0.77)
Lung function  
  FEV1 (n = 925) 83.4 (18.6)
  FVC (n = 921) 89.1 (15.9)
  FEV1/FVC ratio (n = 921) 93.5 (12.8)
  MEF50 (n = 923) 65.9 (29.5)
  1. FEV1 = Forced expiratory volume in 1 second, % predicted; FVC = forced vital capacity, % predicted; FEV1/FVC ratio = FEV1/FVC x 100; MEF50 = maximal expiratory flow at 50% of forced vital capacity, % predicted; SD = standard deviation, n = 951 except as otherwise noted.
  2. *Subjects with emphysema sum score >0.