title: Exhaled nitric oxide: the effects of age, gender and body size.
abstract: Since little is known of the effects of age, gender, and body size on exhaled nitric oxide (NO) production, we have conducted a prospective study to examine these factors in a healthy nonsmoking women (mean age +/- SD 47.7 +/- 15.8, range 20-79 years). Exhaled NO was measured by an automatic chemiluminescence analyzer (Sievers NO Analyser 280) at steady expiration. Men had significantly higher exhaled NO levels than women (p = 0.001). Although exhaled NO levels did not correlate with age (r = 0.12, p = 0.17), it correlated significantly with height (r = 0.23, p = 0.02), weight (r = 0.34, p
authors.affiliation: University Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China.
authors.forename: K W
authors.initials: KW
authors.lastname: Tsang
authors.forename: S K
authors.initials: SK
authors.lastname: Ip
authors.forename: R
authors.initials: R
authors.lastname: Leung
authors.forename: G L
authors.initials: GL
authors.lastname: Tipoe
authors.forename: S L
authors.initials: SL
authors.lastname: Chan
authors.forename: I H
authors.initials: IH
authors.lastname: Shum
authors.forename: M S
authors.initials: MS
authors.lastname: Ip
authors.forename: C
authors.initials: C
authors.lastname: Yan
authors.forename: P C
authors.initials: PC
authors.lastname: Fung
authors.forename: M
authors.initials: M
authors.lastname: Chan-Yeung
authors.forename: W
authors.initials: W
authors.lastname: Lam
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging / Q000378:metabolism*; D001824:Body Constitution; D015992:Body Mass Index; D001830:Body Surface Area; D001944:Breath Tests / Q000295:instrumentation; D005260:Female; D006801:Humans; D008163:Luminescent Measurements; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000032:analysis*; D011446:Prospective Studies; D012016:Reference Values; D012727:Sex Characteristics
chemical_list: D009569:Nitric Oxide