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Table 1 Characteristics of the study population Values are numbers (proportion) or mean (SD); OAD = obstructive airway disease

From: The added value of C-reactive protein to clinical signs and symptoms in patients with obstructive airway disease: results of a diagnostic study in primary care

  Overall No OAD or restrictive pattern Reversible OAD Not reversible OAD
  n (%) n (%) n (%) n (%)
Total study population 60 (100) 23 (38) 27 (45) 10 (17)
Female 40 (67) 15 (65) 19 (70) 6 (60)
Age [mean (SD)] 46 (18) 42 (18) 46 (17) 54 (18)
Have you had wheezing in your chest (yes) 39 (65) 11 (48) 22 (82) 6 (60)
Do you sometimes have dyspnea (yes) 35 (58) 12 (52) 16 (59) 7 (70)
Do you often cough (yes) 26 (43) 15 (65) 9 (33) 2 (20)
Do you often have expectoration (yes) 22 (37) 7 (30) 11 (41) 4 (40)
Wheezing when not having a cold (yes) 25 (42) 7 (30) 15 (56) 3 (30)
Breathless when wheezing was present (yes) 22 (37) 7 (30) 11 (41) 4 (40)
Have you been woken up with a feeling of tightness in your chest (yes) 14 (23) 6 (26) 5 (19) 3 (30)
Have you been woken up by an attack of dyspnea (yes) 13 (22) 6 (26) 7 (26) 0 (0)
Have you been woken up by an attack of coughing (yes) 39 (65) 16 (70) 17 (63) 6 (60)
Do you have any nasal allergies (yes) 25 (42) 10 (43) 12 (44) 3 (30)
Do you often have common cold (yes) 22 (37) 8 (35) 8 (30) 6 (60)
Does it often take longer than 10 days to recover from a common cold (yes) 29 (48) 10 (43) 12 (44) 7 (70)
Do you smoke/Did you smoke (yes) 35 (58) 12 (52) 16 (59) 7 (70)
How much do you smoke [mean in pack year (SD)] 13 (15) 13 (10) 9 (10) 21 (26)