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Table 1 Demographic details and spirometric results from all 1333 subjects

From: COPD and disease-specific health status in a working population

  Total subjects Age Male Cumulative smoking Never smoker Prior diagnosis FEV1 FEV1/FVC
       Number (%)   
  number Years number (%) pack-years number (%) Asthma COPD % pred %
All subjects 1333 56.0 ± 8.2 871 (65.3%) 17.0 ± 21.7 556 (41.7%) 21 (1.6%) 7 (0.5%) 95.8 ± 14.8 78.4 ± 6.7
Non-COPD defined by fixed ratio 1188 55.4 ± 8.1 731 (61.5%) 14.3 ± 19.3 539 (45.4%) 18 (1.5%) 0 (0%) 98.2 ± 13.0 80.1 ± 4.5
COPD defined by fixed ratio 145 61.0 ± 7.7 140 (96.6%) 38.4 ± 27.5 17 (11.7%) 3 (2.1%) 7 (4.8%) 76.6 ± 15.1 64.6 ± 5.6
Non-COPD defined by LLN 1266 55.7 ± 8.2 807 (63.7%) 15.6 ± 20.1 548 (43.3%) 19 (1.5%) 1 (0.1%) 97.3 ± 13.5 79.4 ± 5.2
COPD defined by LLN 67 60.6 ± 7.2 64 (95.5%) 43.0 ± 32.5 8 (11.9%) 2 (3.0%) 6 (8.9%) 68.8 ± 13.0 60.3 ± 5.7
Healthy non-smoking subjects¶# 512 56.2 ± 8.2 123 (24%) 0.0 ± 0.1 495 (96.7%) 8 (1.6%) 0 (0%) 104.5 ± 11.3 81.4 ± 4.4
Healthy smoking subjects¶* 399 54.7 ± 8.0 373 (93.5%) 29.1 ± 15.9 0 (0%) 6 (1.5%) 0 (0%) 98.0 ± 9.0 79.7 ± 4.1
COPD/GOLD stageI 60 60.8 ± 7.5 57 (95.0%) 33.4 ± 23.3 10 (16.7%) 1 (1.7%) 0 (0%) 90.4 ± 8.8 67.4 ± 2.6
COPD/GOLD stageII 79 61.4 ± 8.0 78 (98.7%) 42.1 ± 30.2 6 (7.6%) 1 (1.3%) 7 (8.9%) 68.6 ± 7.7 63.6 ± 4.8
  1. ¶ FEV1 of >85% pred and FEV1/FVC of >0.7, # smoking history of < 1 pack-yr, * smoking history of ≥10 pack-yrs.