TABLE 4.
Proposed fractional exhaled nitric oxide (FENO) percentile developed from the Manchester Asthma and Allergy Study (MAAS) cohort correlated well with percentile within nonasthmatic children within the Study of Eczema and Asthma To Observe the influence of Nutrition (SEATON) cohort.
| MAAS FENO percentile in nonasthmatic children | Number of SEATON participants with FENO above MAAS-defined percentile, n (% (95%CI)) | Equivalent percentile in nonasthmatic children from the SEATON cohort (95% CI) |
| 50th | 282/660 (43 (39–47) | 57th (53rd–61st) |
| 75th | 134/660 (20 17–24) | 80th (76th–83rd) |
| 90th | 67/660 (10 8–13) | 90th (87th–92nd) |
| 98th | 15/660 (2 1–4) | 98th (96th–99th) |