Skip to main content

Table 2 Patient characteristics II- Airway hyperresponsiveness (AHR) and airway inflammation

From: Airway inflammation and mannitol challenge test in COPD

Subjects

n= 28

Airway responsiveness (n= 26)

 

   - AHR to mannitol*(n)

18

   - RDR mannitol (%/mg)

0.044 (0.0204-0.0605)

   - Max dose of mannitol (mg)

395 (315-635)

   - PD15 mannitol**

331 (196-635)

Fraction Exhaled Nitric Oxide

 

   - FeNO (ppb)

14 (9-22.5)

Sputum (n= 23)

 

   - Eosinophils (%)

0.8 (0.4-3.1)

   - Lymphocytes (%)

1.4 (1.0-2.4)

   - Macrophages (%)

18.8 (12.8-22.2)

   - Neutrophils (%)

77.2 (70.8-86.0)

   - Total cell count (x106/g)

1.6 (0.5-2.8)

Blood (n= 28)

 

   - Eosinophils (%)

2.7 (1.8-4.3)

   - Neutrophils (%)

55.9 (49.8-61.8)

  1. Values are expressed as median and interquartile range
  2. RDR, Response Dose Ratio (fall FEV1 divided by cumulative dose given); PD15, Provocation Dose of mannitol to cause a 15% fall in FEV1; pbb, parts per billion.
  3. *: positive reaction to mannitol: PD15 <635 mg; **: including 8 patients who did not reach a PD15, we used an assigned value of 635 mg