Clinical efficacy and mechanism study of mid-frequency anti-snoring device in treating moderate obstructive sleep apnea-hypopnea syndrome

Table 2 Comparison of sleep monitoring parameters before and after treatment (mean ± SD)

Parameter	Before treatment	After treatment	t value	P value
AHI, %	24.38 ± 9.16	12.63 ± 8.27	7.47	< 0.05
LSPO2, %	72.62 ± 9.53	84.84 ± 8.71	4.32	< 0.05
SPO2 < 90%, %	14.65 ± 7.26	10.33 ± 5.32	3.15	< 0.05
Snoring, %	44.54 ± 26.13	15.07 ± 9.25	3.37	< 0.05
Most prolonged apnea duration in s	56.08 ± 20.11	25.58 ± 11.27	4.21	< 0.05
AAI resp as events/h	19.89 ± 11.61	11.74 ± 6.39	5.01	< 0.05
AAI non resp as events/h	15.71 ± 7.18	9.37 ± 4.27	6.11	< 0.05
RERA as events/h	5.91 ± 3.99	2.61 ± 2.65	5.69	< 0.05

Data are mean ± SD. AAI: Autonomous arousal index; AHI: Apnea-hypopnea index; LSPO₂: Lowest pulse oxygen saturation; RERA: Respiratory effort-related arousals; SPO₂: Oxygen saturation.