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Table 1 Characteristics of impaired respiratory health, mortality and socio-demographics of a cohort of women aged 55 years at baseline investigation

From: Does respiratory health contribute to the effects of long-term air pollution exposure on cardiovascular mortality?

  Whole study group N = 4750 Study group with spirometry N = 2580
  n/N % n/N %
FEV1 <80% of predicted value -- -- 409/2577 15.9
FVC <80% of predicted value -- -- 526/2571 20.5
Chronic Bronchitis by physician diagnose 442/4642 9.5 211/2525 8.4
Frequent cough with phlegm production 518/4700 11.0 266/2554 10.4
Frequent cough 1063/4724 22.5 560/2568 21.8
All cause death 399/4750 8.4 183/2580 7.1
Cardiovascular death 127/4750 2.7 53/2580 2.1
Never smoker without ETS 1779/4750 37.5 1191/2577 46.2
Never smoker with ETS 1494/4750 31.5 829/2577 32.2
Ex-smoker 377/4750 7.9 201/2577 7.8
Current smoker with < 15 pack years 270/4750 5.7 136/2577 5.3
Current smoker with 15–30 pack years 284/4755 6.0 137/2577 5.3
Current smoker > 30 pack years 224/4755 4.7 83/2577 3.2
Smoking behaviour unknown 322/4750 6.8 143/2577 5.5
Living in rural area 1681/4750 35.4 1315/2580 51.0
Less then 10 y school 1400/4695 29.8 685/2574 26.6
At least 10 y school 2243/4695 47.8 1253/2574 48.7
More then 10 y school 1052/4695 22.4 636/2574 24.7
  N Mean/SD N Mean/SD
Age [years] 4748 54.5/0.6 2576 54.5/0.7
  1. Abbreviations:
  2. FEV1: Forced expiratory volume in 1 second; FVC: Forced vital capacity; SD: Standard deviation