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Table 2 Prevalence of respiratory symptoms, chronic bronchitis at baseline (1985 - 1994) and at follow-up (2006) and COPD at baseline (1985-1994) and at follow-up (2007/2008) in a subgroup of elderly women

From: Decline in air pollution and change in prevalence in respiratory symptoms and chronic obstructive pulmonary disease in elderly women

  Prevalence
  Baseline Follow-up
Respiratory health outcome all Ruhr area rural areas all Ruhr area rural areas
Chronic Bronchitis by physician's diagnosis a N = 2073
(8.2%)
N = 1167
(9.3%)
N = 905
(6.6%)
N = 2032
(11.6%)
N = 1125
(13.6%)
N = 90782
(9.0%)
Chronic cough a N = 2110
(20.6%)
N = 1175
(22.7%)
N = 935
(18.0%)
N = 1947
(26.5)
N = 1079
(27.9%)
N = 868
(24.7%)
Chronic cough with phlegm production a N = 2099
(9.5%)
N = 1168
10.1%
N = 931
8,8%
N = 1979
(13.3%)
N = 1098
(13.5%)
N = 890
(13.2%)
Mild COPD b FEV 1 /FVC < 0.7 N = 384
(8.6%)
N = 201
10.5%
N = 183
6.6%
N = 347
(18.2%)
N = 179
(12.9%)
N = 163
(22.7%)
Moderate COPD b FEV 1 /FVC< 0.7 and FEV 1 < 80% predicted N = 384
(3.7%)
N = 201
5.0%
N = 183
2.2%
N = 347
(6.6%)
N = 179
(5.6%)
N = 163
(8.0%)
  1. aReported by participant
  2. bOnly in a subgroup that was invited for the follow-up examination in 2007/2008. Women with asthma were excluded