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Table 1 Patient characteristics by Chlamydia pneumoniae DNA detection status.

From: Smoking, season, and detection of chlamydia pneumoniaeDNA in clinically stable COPD patients

 

Entire Study Group (%)

DNAa Present (%)

DNA Absent (%)

Unadjusted ORb (95% CI)

Number

100

27 (27.0)

73 (73.0)

 

Male

61 / 100 (61.0)

20 / 27 (74.1)

41 / 73 (56.2)

2.2 (0.8, 5.9)

Current smoking

32 / 100 (32.0)

13 / 27 (48.1)

19 / 73 (26.0)

2.6 (1.1, 6.6)

Season (Nov. to April)

44 / 100 (44.0)

18 / 27 (66.7)

26 / 73 (35.6)

3.6 (1.4, 9.2)

Smoker or Season

63 / 100 (63.0)

25 / 27 (92.6)

38 / 73 (52.1)

11.5 (2.5, 52.2)

Chronic cough

50 / 98 (51.0)

16 / 26 (61.5)

34 / 72 (47.2)

1.8 (0.7, 4.5)

Chronic sputum

64 / 99 (64.6)

24 / 27 (88.9)

40 / 72 (55.6)

6.4 (1.8, 23.2)

Pneumonia in 1 year

9 / 98 (9.2)

2 / 26 (7.7)

7 / 72 (9.7)

0.8 (0.2, 4.0)

Prednisone

18 / 98 (18.4)

3 / 27 (11.1)

15 / 71 (21.1)

0.5 (0.1, 1.8)

Inhaled corticosteroids

67 / 98 (68.4)

19 / 27 (70.4)

48 / 71 (67.6)

1.1 (0.4, 3.0)

Coronary artery disease

10 / 92 (10.9)

2 / 27 (7.4)

8 / 65 (12.3)

0.6 (0.1, 2.9)

Diabetes mellitus

5 / 92 (5.4)

2 / 27 (7.4)

3 / 65 (4.6)

1.7 (0.3, 10.5)

  1. a C. pneumoniae DNA detected by nested polymerase chain reaction [14]. b Unadjusted odds ratios (OR) with 95% confidence intervals (SPSS).