Table 3 Likelihood ratio at different cut-off points (n = 160); unit of FENO is parts per billion; LR+ is positive likelihood ratio, LR- is negative likelihood ratio
Asthma diagnoses | FENO | LR+ (95%CI) | LR-(95%CI) |
|---|---|---|---|
Borderline BHR, mild BHR, moderate to severe BHR, positive bronchodilator reversibility (n = 75) | > 12 | 1.12 (0.96–1.30) | 0.62 (0.32–1.22) |
> 20 | 1.55 (1.12–2.14) | 0.65 (0.47–0.91) | |
> 35 | 1.94 (1.09–3.48) | 0.81 (0.68–0.98) | |
> 46 | 4.53 (1.96–10.49) | 0.73 (0.62–0.86) | |
> 76 | not calculable | not calculable | |
Mild BHR, moderate to severe BHR, positive bronchodilator reversibility (n = 58) | > 12 | 1.19 (1.03–1.37) | 0.42 (0.18–0.97) |
> 20 | 1.76 (1.30–2.39) | 0.53 (0.36–0.79) | |
> 35 | 2.17 (1.25–3.77) | 0.77 (0.62–0.95) | |
> 46 | 4.10 (2.02–8.36) | 0.70 (0.57–0.86) | |
> 76 | not calculable | not calculable |