Table 5.
—Application of ATS Guideline Algorithma for Significant Increase in Feno
| Acute Health-care Encounter | Crude OR (95% CI) | Adjusted ORb (95% CI) |
| Unscheduled doctor visit | 0.97 (0.58-1.63) | 1.02 (0.59-1.76) |
| ED visit | 1.26 (0.78-2.04) | 1.25 (0.75-2.08) |
| Hospitalization | 0.57 (0.07-4.76) | 0.67 (0.07-6.15) |
| Any acute health-care use | 1.12 (0.74-1.67) | 1.11 (0.72-1.72) |
ATS = American Thoracic Society. See Table 1 legend for expansion of other abbreviations.
a
For every significant increase between consecutive Feno measurements over 3-mo intervals, defined as Feno level increased by > 7 ppb for values < 35 ppb or > 20% for Feno ≥ 35 ppb for those aged < 12 y and Feno level increased by > 10 ppb for values < 50 ppb or > 20% for Feno level ≥ 50 ppb for those aged ≥ 12 y.
b
Adjusted for baseline age, sex, and FEV1/FVC ratio.