Does ethnicity influence fractional exhaled nitric oxide in healthy individuals? A systematic review
Author(s)
Blake, Tamara L
Chang, Anne B
Chatfield, Mark D
Petsky, Helen L
Rodwell, Leanne T
Brown, Michael G
Hill, Deb C
McElrea, Margaret S
Griffith University Author(s)
Year published
2017
Metadata
Show full item recordAbstract
BACKGROUND: Fractional exhaled nitric oxide (FENO) is used clinically as a biomarker of
eosinophilic airway inflammation. Awareness of the factors influencing FENO values is
important for valid clinical interpretation.
METHODS: We undertook a systematic review of PubMed, Cochrane Library, Scopus, and
Web of Science databases and reference lists of included articles to evaluate whether ethnicity
influences FENO values, and to determine if this influence affects clinical interpretation
according to current guidelines. We included all studies that performed online FENO
measurements on at least 25 healthy, non-Caucasian individuals, ...
View more >BACKGROUND: Fractional exhaled nitric oxide (FENO) is used clinically as a biomarker of eosinophilic airway inflammation. Awareness of the factors influencing FENO values is important for valid clinical interpretation. METHODS: We undertook a systematic review of PubMed, Cochrane Library, Scopus, and Web of Science databases and reference lists of included articles to evaluate whether ethnicity influences FENO values, and to determine if this influence affects clinical interpretation according to current guidelines. We included all studies that performed online FENO measurements on at least 25 healthy, non-Caucasian individuals, and examined the effect of ethnicity on FENO. RESULTS: From 62 potential studies, 12 studies were included. One study recruited only children (< 12 years of age), six studies recruited children and/or adolescents, four studies recruited adults only, and a single study involved children, adolescents, and adults. In total, 16 different ethnic populations representing 11 ethnicities were studied. Ethnicity was considered a significant influencing factor in 10 of the included studies. We found the geometric mean FENO to be above the normal healthy range in two studies. We also identified five studies in which at least 5% of participants had FENO results above the age-specific inflammatory ranges. CONCLUSIONS: Ethnicity influences FENO values, and for some ethnic groups this influence likely affects clinical interpretation according to current guidelines. There is a need to establish healthy FENO reference ranges for specific ethnic groups to improve clinical application.
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View more >BACKGROUND: Fractional exhaled nitric oxide (FENO) is used clinically as a biomarker of eosinophilic airway inflammation. Awareness of the factors influencing FENO values is important for valid clinical interpretation. METHODS: We undertook a systematic review of PubMed, Cochrane Library, Scopus, and Web of Science databases and reference lists of included articles to evaluate whether ethnicity influences FENO values, and to determine if this influence affects clinical interpretation according to current guidelines. We included all studies that performed online FENO measurements on at least 25 healthy, non-Caucasian individuals, and examined the effect of ethnicity on FENO. RESULTS: From 62 potential studies, 12 studies were included. One study recruited only children (< 12 years of age), six studies recruited children and/or adolescents, four studies recruited adults only, and a single study involved children, adolescents, and adults. In total, 16 different ethnic populations representing 11 ethnicities were studied. Ethnicity was considered a significant influencing factor in 10 of the included studies. We found the geometric mean FENO to be above the normal healthy range in two studies. We also identified five studies in which at least 5% of participants had FENO results above the age-specific inflammatory ranges. CONCLUSIONS: Ethnicity influences FENO values, and for some ethnic groups this influence likely affects clinical interpretation according to current guidelines. There is a need to establish healthy FENO reference ranges for specific ethnic groups to improve clinical application.
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Journal Title
Chest
Volume
152
Issue
1
Subject
Clinical sciences