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Table 2 Prevalence of airway diseases, symptoms and lung function in 55 year old women

From: Long-term air pollution exposure and living close to busy roads are associated with COPD in women

  all   With spirometry (N = 2593)
  n/N % N/N %  
Chronic bronchitis by physician diagnosis 442/4649 9.5 211/2537 8.4  
Chronic cough with phlegm production 225/4701 4.8 116/2563 4.6  
Frequent cough 1065/4731 22.5 561/2581 21.8  
COPD FEV1/FVC<0.7    116/2581 4.5  
    n Mean SD
FEV1 [L]    2590 2.55 0.46
FVC [L]    2584 3.09 0.51
FEV1/FVC    2581 0.83 0.07