An increased content of @entity273 ( @entity274 ), a marker of @entity32 , has been described in the condensate of exhaled air from adults and @entity1 with @entity55 , including @entity565 . However, the normal range of [ @entity274 ] in the exhaled air condensate from healthy @entity1 has not been established. Therefore, the aim of this study was to determine the reference range of exhaled [ @entity274 ] in healthy school-aged @entity1 . Ninety-three healthy nonsmoking @entity1 (48 female and 45 male, mean age 10 yrs, range 8-13 yrs), with a negative history for @entity566 , @entity484 or @entity1576 and with a normal lung function, participated. Exhaled air condensate was examined fluorimetrically for the presence of @entity274 . In addition, the reproducibility of [ @entity274 ] within subjects and between days and the stability of [ @entity274 ] during storage at -20 degrees C were assessed. The median [ @entity274 ] in the exhaled air condensate of all @entity1 was 0.13 microM, with a 2.5-97.5% reference range of <0.01-0.48 microM. No significant difference existed between males and females. There was no correlation between exhaled [ @entity274 ] and age or lung function. Repeated [ @entity274 ] measurements on 2 consecutive days showed satisfactory within-subject reproducibility and [ @entity274 ] in stored samples remained stable for at least 1 month at -20 degrees C. In conclusion, this study provides reference data for exhaled @entity273 in a large group of healthy @entity1 . The observed levels were lower than those reported previously for healthy adults and were independent of age, sex and lung function.

XXXX in exhaled air of healthy @entity1 : reference values.

@entity1 :: ('9606', 'Species') :: ['children'] @entity32 :: ('MESH:D007249', 'Disease') :: ['inflammation'] @entity274 :: ('CHEBI:16240', 'Chemical') :: ['H2O2'] @entity55 :: ('MESH:D011014', 'Disease') :: ['inflammatory lung disorders'] @entity565 :: ('MESH:D001249', 'Disease') :: ['asthma'] @entity566 :: ('MESH:D006967', 'Disease') :: ['allergy'] @entity273 :: ('MESH:D006861', 'Chemical') :: ['hydrogen peroxide'] @entity1576 :: ('MESH:D012131', 'Disease') :: ['respiratory disease'] @entity484 :: ('MESH:D004485', 'Disease') :: ['eczema']
@entity273 :: (MESH:D006861,Chemical) :: ['Hydrogen peroxide']
