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Table 5 Percent of patients reporting worsening symptoms on pollution or clean air visits

From: Respiratory effects of particulate air pollution episodes in former smokers with and without chronic obstructive pulmonary disease: a panel study

 

Control

COPD

Pollution days

Clean air days

Pollution days

Clean air days

Symptoms

% (n)

% (n)

% (n)

% (n)

Nasal congestion discharge

50.0 (6)

45.4 (5)

68.8 (11)

30.8 (4)

Activity limitation

25.0 (3)

0.0 (0)

62.5 (10)

30.8 (4)

Chest tightness

33.3 (4)

9.1 (1)

43.8 (7)

7.7 (1)

Cough

66.7 (8)

36.4 (4)

56.2 (9)

15.4 (2)

Shortness of breath

41.7 (5)

9.1 (1)

62.5 (10)

23.1 (3)

Sputum thickness

41.7 (5)

9.1 (1)

50.0 (8)

15.4 (2)

Sputum amount

41.7 (5)

18.2 (2)

56.2 (9)

30.8 (4)

Wheeze

0.0 (0)

9.1 (1)

37.5 (6)

15.4 (2)

  1. Displayed are the number and percent of patients reporting worsening symptoms on at least one polluted air day and on at least one clean air day for the Control and COPD groups