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Reference ranges for exhaled nitric oxide fraction in healthy Japanese adult population. 2010

Kazuto Matsunaga, and Tsunahiko Hirano, and Tomotaka Kawayama, and Takahiro Tsuburai, and Hiroyuki Nagase, and Hisamichi Aizawa, and Kazuo Akiyama, and Ken Ohta, and Masakazu Ichinose
Third Department of Internal Medicine, Wakayama Medical University, Japan.

BACKGROUND The measurement of the exhaled nitric oxide fraction (FE(NO)) is proposed as a useful marker of airway inflammation. In healthy adults, there have been a few studies of the reference ranges for FE(NO) in Caucasians. A community study in other regions may reveal any possible ethnic differences in the FE(NO) levels. METHODS A total of 240 healthy adults aged between 18 to 74 years were recruited from four medical centers in Japan. Current smokers and subjects having a history of atopic disease were not included. FE(NO) was measured using an online electrochemical nitric oxide analyzer according to the current guidelines. The reference ranges for FE(NO) were estimated using two different statistical methods recommended by International Federation of Clinical Chemistry and Laboratory Medicine. RESULTS The mean FE(NO) was 16.9 ppb (parts per billion) with a 95% prediction interval (2.5 to 97.5 percentiles) of 6.5 to 35.0 ppb in healthy Japanese adults. Normality assumptions were met for the logarithm-transformed FE(NO). The geometric mean FE(NO) was 15.4 ppb with a mean ± two standard deviations of 6.5 to 36.8 ppb. Age, gender, height, and past smoking history were not associated with the FE(NO) levels. CONCLUSIONS The reference ranges for FE(NO) in healthy Japanese adults were similar to those of Caucasians. It seems reasonable that the upper limit of FE(NO) for healthy adults should be set at approximately 36.0 ppb irrespective of ethnic differences.

UI MeSH Term Description Entries
D007564 Japan A country in eastern Asia, island chain between the North Pacific Ocean and the Sea of Japan, east of the Korean Peninsula. The capital is Tokyo. Bonin Islands
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009569 Nitric Oxide A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP. Endogenous Nitrate Vasodilator,Mononitrogen Monoxide,Nitric Oxide, Endothelium-Derived,Nitrogen Monoxide,Endothelium-Derived Nitric Oxide,Monoxide, Mononitrogen,Monoxide, Nitrogen,Nitrate Vasodilator, Endogenous,Nitric Oxide, Endothelium Derived,Oxide, Nitric,Vasodilator, Endogenous Nitrate
D011237 Predictive Value of Tests In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test. Negative Predictive Value,Positive Predictive Value,Predictive Value Of Test,Predictive Values Of Tests,Negative Predictive Values,Positive Predictive Values,Predictive Value, Negative,Predictive Value, Positive
D012016 Reference Values The range or frequency distribution of a measurement in a population (of organisms, organs or things) that has not been selected for the presence of disease or abnormality. Normal Range,Normal Values,Reference Ranges,Normal Ranges,Normal Value,Range, Normal,Range, Reference,Ranges, Normal,Ranges, Reference,Reference Range,Reference Value,Value, Normal,Value, Reference,Values, Normal,Values, Reference
D012130 Respiratory Hypersensitivity A form of hypersensitivity affecting the respiratory tract. It includes ASTHMA and RHINITIS, ALLERGIC, SEASONAL. Airway Hyperresponsiveness,Hypersensitivity, Respiratory,Airway Hyper-Responsiveness,Airway Hyper Responsiveness,Airway Hyperresponsivenesses,Hyper-Responsiveness, Airway,Hyperresponsiveness, Airway,Respiratory Hypersensitivities
D001944 Breath Tests Any tests done on exhaled air. Breathalyzer Tests,Breath Test,Breathalyzer Test,Test, Breath,Test, Breathalyzer,Tests, Breath,Tests, Breathalyzer
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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