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Table 1 Characteristics of the study population

From: Comparison of inflammatory markers in induced and spontaneous sputum in a cohort of COPD patients

  n %
Patients 45  
Age, mean (range) * 63.4 (46-74)  
Sex   
Women 15 33
Men 30 67
Smoking habits   
Ex 30 67
Current 15 33
GOLD (2007) stage *   
II 15 33
III 24 53
IV 6 13
Patients with one sputum pair ** 36 80
Patients with multiple sputum pairs 9 20
Sputum pairs 60  
stable state 31 52
during exacerbation 29 48
H.influenza positive   
No 12  
Yes 12  
  1. *At inclusion.
  2. **Consisting of one spontaneous and one induced sputum sample.
  3. Detected in induced and/or spontaneous sputum sampled from stable state visits, and/or exacerbations.