Table 3: Comparison of exhaled nitric oxide in young and old patients with asthma.

SubjectsFENO (ppb), seniors
(mean ± SD)
FENO (ppb), youth
(mean ± SD)

All with asthma <0.05
Smokers with asthma <0.05
Nonsmokers with asthma <0.05

Student’s -test for unrelated samples with Bonferroni correction.