Fraction of exhaled nitric oxide in healthy elderly Tunisian subjects

Nitric Oxide : Biology and Chemistry
Ines SfaxiSonia Rouatbi

Abstract

Exhaled-fraction-of-nitric-oxide (FeNO) norms are absent in healthy elderly North-African subjects. i) to identify FeNO influencing factors of elderly Tunisians older 50 years and more; ii) to assess the applicability of some published FeNO norms for elderly in local population; iii) to set-up FeNO norms and to prospectively evaluate their validity in two elderly validation-groups (healthy and asthmatic subjects). A convenience sample of healthy and asthmatic elderly Tunisians was recruited. Subjects responded to a medical questionnaire and then FeNO levels were measured by an online method (Medisoft, Sorinnes (Dinant), Belgium). Clinical, anthropometric and spirometric data were collected. Three groups of subjects were identified: group I (healthy-elderly; n = 100, 57 females); group II (healthy-validation; n = 17, 4 females) and group III (asthmatic-validation; n = 10, 9 females). ANOVA was performed to compare the three groups' data. No significant factor, among those evaluated, influenced Tunisian elderly FeNO values. The available published FeNO norms did not reliably predict FeNO in Tunisian elderly population. The mean ± SD (minimum-maximum) of FeNO (ppb) for group I was 14 ± 6 (3-34). For Tunisian people, each elderly F...Continue Reading

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