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Table 3 The odds ratio (OR) for having COPD

From: The prevalence of undiagnosed chronic obstructive pulmonary disease in a primary care population with respiratory tract infections - a case finding study

   

COPD

Age

Years

≥ 55

10.9 [3.8-30.1]

  

< 55

1.0

Smoking intensity

Pack years

≥ 20

3.2 [1.2-8.5]

  

< 20

1.0

Smoking status

Current smoker

yes

2.5 [0.9-6.6]

  

no

1.0

Diagnosis

 

Upper respiratory infection

0.8 [0.3-2.0]

  

Lower respiratory infection

1.0

Sex

 

female

0.9 [0.3-2.1]

  

male

1.0

  1. Odds ratios adjusted for pack years, age, current smoking status, diagnosis and sex with 95% confidence intervals.