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Table 2 Patient's characteristics

From: Analysis of nitrogen oxides (NOx) in the exhaled breath condensate (EBC) of subjects with asthma as a complement to exhaled nitric oxide (FeNO) measurements: a cross-sectional study

 

Asthma (n = 23)

Controls (n = 23)

Statistics1

Age (years) a

50.0 [30.0 - 56.0]

46 [28.0 - 51.0]

0.534

Height (meter) a

1.65 [1.62 - 1.75]

1.68 [1.62 - 1.75]

0.767

Weight (kg) a

73.0 [63.0 - 84.0]

70.0 [61.0 - 75.0]

0.347

BMI (kg/m2) a

26.5 [22.5 - 27.7]

23.4 [21.7 - 26.1]

0.173

Male b

12 (52.2)

7 (30.4)

0.134

Smoking b

  

1.0

   Ex-smoker

4 (17.4)

4 (17.4)

 

   Smoker

6 (26.1)

6 (26.1)

 

   Non-smoker

13 (56.5)

13 (56.5)

 

TLC (obs/pred) a,c

106.4 [100.6 - 116.0]

108.6 [100.2 - 112.6]

0.859

SVC (obs/pred) a,c

90.5 [81.0 - 95.4]

106.6 [100.4 - 119.2]

< 0.001

FEV1 (obs/pred) a,c

56.5 [50.3 - 73.7]

107.1 [100.8 - 115.6]

< 0.001

FEV1/SVC (obs/pred) a,c

69.4 [57.2 - 77.9]

102.8 [96.7 - 105.9]

< 0.001

MMEF (obs/pred) a,c

23.4 [14.5 - 38.5]

95.7 [79.2 - 107.6]

< 0.001

TLCO (obs/pred) a,c

78.5 [68.5 - 94.0]

90.0 [81.0 - 103.5]

0.102

Total expired volume (L) a

204 [200 - 250]

205 [200 - 225]

0.6292

Total volume of EBC (mL) a

4.00 [3.50 - 5.00]

4.00 [3.75 - 4.50]

0.7872

Time (min) a

20 [16 - 25]

20 [18 - 24]

0.9112

  1. BMI: body mass index, TLC: total lung capacity, SVC: slow vital capacity, FEV1: forced expiratory volume in 1s, MMEF: Maximum mid-expiratory flow, TLCO: carbon monoxide gas transfer
  2. a data expressed as median [IQR]
  3. b data expressed as n (%)
  4. c data expressed as % of predicted values
  5. 1 p(Chi-2)
  6. 2 ANOVA on the ranks