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Table 3 FENO results (ppb) of non-smokers, i e never-smokers and former smokers united (n = 2881), of the ADONIX database subdivided according to age class and sex

From: Reference values of fractional excretion of exhaled nitric oxide among non-smokers and current smokers

Age class (years)

Women (n = 1449)

Men (n = 1432)

p

n

Median

5th perc

95th perc

n

Median

5th perc

95th perc

25–34

103

12.9

5.9

30.3

88

16.8

9.4

39.5

<.0001

35–44

320

14.3

6.8

31.3

296

17.5

7.9

38.9

<.0001

45–54

406

15.4

7.7

33.6

417

19.1

8.8

41.7

<.0001

55–64

411

18.1

8.3

37.9

418

20.0

9.3

43.2

0.010

>64

209

19.5

8.3

42.2

213

21.1

9.2

50.6

0.028

  1. p values refer to differences between median values according to the Mann-Whitney two- sided test
  2. Number of subjects, median values and the 5th and 95th percentiles are presented
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BMC Pulmonary Medicine

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