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Table 5 Comparison of models with estimated and observed prevalence of respiratory symptoms and COPD among female never smokers

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

Time

Exposure

Prevalence [%]

  

Model: PM 10

Model: NO 2

observed

Chronic cough

Baseline

Median exposure a

19.8

20.1

18.9

15 years later

No exposure decline

38.6

28.1

--

 

Exposure decline b

26.4

26.4

26.5

Chronic cough with phlegm production

Baseline

Median exposure a

9.1

8.9

8.8

15 years later

No exposure decline

21.4

14.3

--

 

Exposure decline b

13.3

13.0

13.3

Mild COPD c

Baseline

Median exposure a

8.5

9.4

8.4

15 years later

No exposure decline

39.5

23.1

--

 

Exposure decline b

17.5

16.1

18.2

Moderate COPD d

Baseline

Median exposure a

3.6

4.0

3.2

15 years later

No exposure decline

15.6

8.1

--

 

Exposure decline b

6.3

5.6

6.6

  1. a Exposure at baseline (median) of PM10 and NO2: 48.3 mg/m3 and 46.6 μg/m3
  2. b Exposure decline (average) of PM10 and NO2: 20 μg/m3 and 10 μg/m3
  3. c FEV1 /FVC < 0.7
  4. d FEV1 /FVC < 0.7 and FEV1 < 80% reference value