Table 1.

Measurements from the 15 participants showing individual nasopharyngeal pressures (cm H₂O) and mean nasopharyngeal pressures (cm H₂O) with sd generated with NHF and facemask at 35 litre min⁻¹ with the open mouth (NHFMO and FMMO) and closed mouth positions (NHFMC and FMMC)

Participant	Mean nasopharyngeal pressure (cm H2O)
	NHFMC	NHFMO	FMMC	FMMO
1	1.7	1.6	1.3	0.3
2	2.7	1.7	—	1.3
3	—	—	—	—
4	1.5	0.9	−0.2	−0.5
5	1.6	0.2	−0.01	0.02
6	2.2	0.5	0.005	−0.01
7	3.4	2.1	0.02	0.06
8	2.7	1.6	−0.003	0.04
9	3.4	0.7	−0.09	0.02
10	2.2	0.9	0.02	−0.04
11	5.3	2.3	1.7	0.4
12	1.7	0.1	−0.5	0.02
13	2.5	2.4	0.6	−0.06
14	3.0	0.7	0.006	0.04
15	3.7	1.5	−0.1	0.03
Mean airway pressure at 35 litre min−1	2.7	1.2	0.2	0.1
sd	1.04	0.76	0.63	0.39