http://www.cnr.it/ontology/cnr/individuo/prodotto/ID12262
Factors that influence exhaled nitric oxide in Italian schoolchildren. (Articolo in rivista)
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- Label
- Factors that influence exhaled nitric oxide in Italian schoolchildren. (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
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- F Cibella; G Cuttitta; S La Grutta;G Passalacqua; G Viegi (literal)
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- Istituto di Biomedicina e Immunologia Molecolare del Consiglio Nazionale delle Ricerche, Palermo
ARPA Sicilia, Palermo (literal)
- Titolo
- Factors that influence exhaled nitric oxide in Italian schoolchildren. (literal)
- Abstract
- BACKGROUND: Conflicting results exist about the meaning of exhaled nitric oxide (eNO) in epidemiologic studies, mainly because of the numerous factors that may affect the measurement. OBJECTIVES: To evaluate the role of the factors that influence eNO levels in a sample of schoolchildren with or without respiratory diseases. We studied 335 schoolchildren, ages 10 to 16 years, from 8 schools in Palermo, Italy. After a respiratory questionnaire was completed, spirometry, skin tests, and eNO measurements were performed. RESULTS: Among 335 children, 13.7% reported symptoms of bronchial asthma, 46.9% reported symptoms of rhinitis, and 39.4% were asymptomatic. The ratio of forced expiratory volume in 1 second to forced vital capacity was 87.6% (SD, 6.4%) in the bronchial asthma group, 90.6% (SD, 5.0%) in the rhinitis group, and 90.4% (SD, 5.1%) in the asymptomatic group (P < .002). Atopic children constituted 52.2% of the bronchial asthma group, 40.1% of the rhinitis group, and 28.8% of the asymptomatic group. Among atopic children, 102 (82%) had a positive skin test result for Dermatophagoides. Median eNO was 12.6 ppb in nonatopic children and 21.2 ppb in atopic children (P < .001, by Mann-Whitney U test). Among asymptomatic children, atopic children had significantly higher eNO levels than did nonatopic children (P < .001). In nonatopic children, no difference was found in log transformation eNO among healthy, rhinitic, or asthmatic children. Log transformation eNO increased with the number of positive skin test results (P < .001). Atopy, asthma, male sex, and indoor allergens were predictors of increased eNO in a logistic model. CONCLUSIONS: Atopy (in particular, sensitization to indoor and perennial allergens) is strongly associated with higher eNO levels. Such association is enhanced by asthma (literal)
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