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Table 1 Clinical characteristics

From: Comprehensive characterisation of pulmonary and serum surfactant protein D in COPD

subjects age gender FEV1
[% predicted]
FEV1/FVC
[%]
Pack years
healthy non-smokers (n = 10) 25.8 ± 1.4# 7 F, 3 M 106.1 ± 3.0# 79.8 ± 2.1# 0#
young smokers (n = 10) 30.7 ± 2.9# 3 M, 7 F 97.8 ± 3.9# 78.8 ± 2.0# 14.9 ± 4.4#.
elderly smokers (n = 20) 52.8 ± 1.4* 14 M, 6 F 112.8 ± 3.3# 74.7 ± 1.0# 38.6 ± 5.5*
smokers with COPD (n = 20) 55.0 ± 1.4* 14 M, 6 F 60.5 ± 1.5* 46.9 ± 2.2* 48.0 ± 2.7*
  1. (F = female, M = male, FEV1 = forced expiratory volume in one second, FVC = forced vital capacity. Mean values ± SEM are given. * indicates p < 0.05 compared to healthy non-smokers and # indicates p < 0.05 to smokers with COPD.)