Table 3.

Absolute differences between tidal breathing parameters measured by PNT and SLP (primary cohort)

Tidal breathing parameters	Absolute difference between PNT and SLP (SLP–PNT)a
	Breath‐by‐breath	Averaged (over 45 s)
RR (brpm)	−0.04 [−1.44, 1.35]	−0.04 [−0.19, 0.11]
tI (sec)	0.02 [−0.19, 0.22]	0.02 [−0.12, 0.16]
tE (sec)	−0.01 [−0.29, 0.27]	−0.01 [−0.16, 0.13]
tTot (sec)	0.01 [−0.30, 0.32]	0.01 [−0.05, 0.07]
tI/tE	0.01 [−0.15, 0.16]	0.01 [−0.07, 0.09]
tI/tTot	0 [−0.04, 0.05]	0 [−0.02, 0.03]
IE50	0.05 [−0.45, 0.55]	0.05 [−0.15, 0.25]

brpm, breaths per minute; 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.

^aValues are mean [LOA].