Table 1.

Partitioned Exhaled NO Reference Values in Asthma using Slope-Intercept Method (Fig. 4).

Author, year	Asthmatics	Airway NO (nl/s)	Alveolar NO (ppb)
Lehtimaki et al. 2000 68	Adults (n=10) Steroid Naive	2.6 ± 0.6 †	1.5 ± 0.3
Lehtimaki et al. 2001a 69	Adults (n=40) Steroid Naïve	2.5 ± 0.3 †	1.1 ± 0.2
Gelb et al. 2004 38	Adults (n=53) ICS Treated	2.4 ± 3.1 †	7.0 ± 7.4 †
Lehtimaki et al. 2005 73	Adults (n=65) Steroid Naïve	2.5 ± 0.3 †	1.1 ± 0.2
Paraskakis et al. 2006 98	Children (n=52) ICS Treated	1.23 [range, 0.2–0.9] †	2.22 [range, 0.4–6.6] †

^†significantly elevated versus controls

ICS: inhaled corticosteroid