Table 2

Changes in FeNO levels in Mylar bags stored at 4°C after sampling, in relation to various factors
n 9 hours 24 hours 72 hours 168 hours
% (SD) p value % (SD) p value % (SD) p value % (SD) p value
Sex
Male 22 101.2 (9.0) 0.105 100.3 (10.8) 0.643 101.7 (16.3) 0.799 104.9 (29.8) 0.689
Female 26 97.9 (4.8) 99.2 (3.6) 102.7 (8.5) 107.7 (17.1)
Age (years)
<40 20 98.8 (4.0) 0.623 99.3 (4.7) 0.779 101.2 (7.5) 0.646 104.7 (15.0) 0.676
≥40 28 99.8 (8.8) 100.0 (9.4) 103.0 (15.2) 107.6 (28.3)
Wheezing
Yes 8 100.3 (4.0) 0.709 97.3 (4.4) 0.340 96.4 (10.0) 0.150 95.5 (22.5) 0.154
No 40 99.2 (7.7) 100.2 (8.2) 103.4 (12.7) 108.6 (23.4)
Allergic rhinitis or pollinosis
Yes 20 100.3 (8.7) 0.291 100.3 (9.6) 0.558 103.9 (15.5) 0.292 109.3 (28.9) 0.310
No 28 98.1 (4.1) 98.9 (4.0) 100.0 (6.0) 102.3 (12.4)
Cigarette Smoking
Never 33 98.5 (4.5) 0.010 99.3 (3.9) 0.007 101.6 (8.2) 0.003 105.2 (17.1) 0.006
Ever 9 97.5 (2.3) 95.7 (3.0) 95.1 (7.7) 93.9 (15.4)
Current 6 107.4 (15.9)* 107.9 (18.4) * 116.4 (24.7) * 131.8 (43.5) *

Data are shown as percentages relative to the baseline values immediately after sampling.

* p<0.05, significantly different from nonsmokers. p<0.05; p<0.01, significantly different from ex-smokers.

Yoda et al.

Yoda et al. BMC Pulmonary Medicine 2012 12:68   doi:10.1186/1471-2466-12-68

Open Data