FeNO50 ppb¶ | 15.4±2.1 |
Data missing | 3.0 |
J′awNO pL·s−1#,¶ | 875.6±2.3 |
DawNO pL·s−1·ppb−1#,¶ | 18.8±1.8 |
FeNO300 ppb | 4.2±2.0 |
Data missing | 16.6 |
CANO ppb# | 1.4±0.7 |
Age years | 13.4±0.6 |
Male | 48.7 |
Body mass index percentile | 61.9±30.3 |
Data missing | 0.3 |
Race/ethnicity | |
White/non-Hispanic | 30.9 |
Hispanic | 58.2 |
Black | 1.7 |
Asian/Hawaiian/Pacific Islander | 4.1 |
Other | 4.7 |
Data missing | 0.4 |
Parent education | |
Up to 12th grade | 19.7 |
Completed 12th grade | 15.5 |
Beyond 12th grade | 58.7 |
Data missing | 6.1 |
Rhinitis history | |
Never | 30.4 |
No current | 38.1 |
Current | 31.5 |
Asthma | 19.6 |
Asthma medication use, in the 321 children with asthma+ | |
None | 63.2 |
Rescue only | 18.4 |
Control only | 2.8 |
Rescue and control | 14.3 |
Data missing | 1.2 |
Exposed to secondhand smoke | 8.4 |
Time of FeNO test | |
07:00–9:59 h | 33.0 |
10:00–11:59 h | 40.7 |
12:00–16:07 h | 26.3 |
Data are presented as mean±sd or %, unless otherwise stated. FeNOx: FeNO measured at an exhalation flow rate of x mL·s−1; J′awNO: maximum airway wall nitric oxide flux; DawNO: diffusing capacity of the airway wall tissue for nitric oxide; CANO: alveolar nitric oxide concentration. #: estimated population-level values from the mixed effects regression model used to estimate the nitric oxide parameters; ¶: geometric mean±sd; +: of children without parent report of doctor-diagnosed asthma, eight reported taking rescue medication only, five took control medication only, four took both and 18 were missing a response to this question.