Table 4.
Percentage differences between tidal breathing parameters measured by PNT and SLP (primary cohort)
| Tidal breathing parameters | Percentage difference between PNT and SLP (SLP–PNT)a | |
|---|---|---|
| Breath‐by‐breath | Averaged (over 45 sec) | |
| RR (%) | −0.13 [−7.7, 7.4] | −0.25 [−1.2, 0.7] |
| tI (%) | 1.12 [−11.1, 13.4] | 1.10 [−5.5, 7.7] |
| tE (%) | −0.10 [−11.0, 10.8] | −0.44 [−5.5, 4.6] |
| tTot (%) | 0.27 [−6.8, 7.3] | 0.15 [−1.2, 1.6] |
| tI/tE (%) | 1.64 [−17.1, 20.4] | 1.64 [−9.7, 13.0] |
| tI/tTot (%) | 0.87 [−9.7, 11.4] | 0.92 [−5.6, 7.4] |
| IE50 (%) | 5.65 [−33.5, 44.8] | 4.85 [−10.7, 20.4] |
IE50, inspiratory to expiratory flow ratio at 50% tidal volume (or SLP equivalent); LOA, limits of agreement; PNT, pneumotachography; RR, respiratory rate; SLP, structured light plethysmography; tE, expiratory time; tI, inspiratory time; tI/tE, inspiratory/expiratory time ratio; tI/tTot, duty cycle; tTot, total breath time.
a
Values are mean [LOA].