Table 3.

Minute by minute AHI and other oxygen-related variables data’s differences at four initial MPSs

N = 5997	SMP (a) (n = 854)	CMP(b) (n = 114)	NMP(c) (n = 3661)	IMP(d) (n = 1368)	P-value
AHI(events/min)	0.69 ± 0.75	0.52 ± 0.72	0.31 ± 0.59ab	0.75 ± 0.75bc	< .001**
OA(events/min)	0.21 ± 0.49	0.19 ± 0.50	0.07 ± 0.31ab	0.34 ± 0.58abc	< .001**
CA(events/min)	0.01 ± 0.11	0.01 ± 0.09	0 ± 0.06	0.01 ± 0.11c	.007*
MA(events/min)	0.01 ± 0.11	0 ± 0	0 ± 0.04a	0 ± 0.06a	< .001**
HYPO(events/min)	0.46 ± 0.66	0.32 ± 0.55	0.23 ± 0.51a	0.40 ± 0.63c	< .001**
ODI(events/min)	0.66 ± 0.76	0.46 ± 0.64a	0.30 ± 0.58ab	0.75 ± 0.76abc	< .001**
T90 (%)	6.18 ± 13.73	3.10 ± 9.53a	1.25 ± 6.28a	5.52 ± 12.96ac	< .001**
Mean SpO2 (%)	93.87 ± 3.58	93.99 ± 2.41	96.32 ± 2.71ab	94.35 ± 3.47ac	< .001**
Snore (events/min)	6.52 ± 4.70	6.35 ± 4.98	2.83 ± 4.37ab	5.23 ± 4.50ac	< .001**

Analysis of variance and Scheffe’s post hoc tests are used. a = compared with side mouth puffing sleep (SMP), b = compared with CMP, c = compared with NMP; *p < 0.05, **p < 0.001. AHI, apnea/hypopnea index; OA, obstruct apnea; CA, centra apnea; MA, mix apnea; HYPO, hypopnea; ODI, oxygen desaturation index; T90, percentage of oxygen saturation under 90; SMP, side mouth puffing; CMP, complete mouth puffing; NMP, non-mouth puffing; IMP, intermittent mouth puffing; n, the number of data minutes