Table 2.

EEP produced by different nasal cannulae in HFNC at different flow rates

Flowrate(L/min)	5 mm	4 mm	3 mm	5 mm–4 mm	4 mm–3 mm
0	0.65(0.32)*	0.51(0.40)#	0.47(0.35)#	0.14(0.45)	0.07(0.36)
10	1.34(0.98)*	0.94(0.46)#	0.86(0.55)#	0.50(1.03)	0.08(0.60)&
20	2.08(1.75)*	1.70(0.80)#	1.43(0.85)#	0.50(1.43)	0.13(0.58)&
30	3.12(2.06)*	2.31(0.82)#	2.31(0.92)#*	0.59(1.71)	0.23(0.90)&
40	4.92(2.53)*	3.25(1.19)#	3.25(1.13)#*	0.86(1.64)	0.11(0.98)&
50	6.21(2.93)*	4.47(1.81)#	4.24(1.82)#*	1.03(2.04)	0.41(1.35)&
60	7.18(4.18)*	6.01(2.21)#	5.26(1.88)#*	0.95(2.26)	0.07(0.36)

Values are median (IQR), # represents P < 0.05 compared to 5 mm cannula at the same flow rate, * represents P < 0.05 compared to 4 mm cannula, & represents P < 0.05 compared to EEP difference between 5 mm and 4 mm cannula at the same flow