Table 3.

Correlation between the snoring parameters and polysomnography parameters.

	Snoring percentage (/h)	Snoring episode index (/h)	Average snoring episode duration (min)	Longest snoring episode duration (min)
Age (years)	− 0.074**	− 0.085**	− 0.080**	− 0.097**
Body mass index (kg/m2)	0.230**	0.373**	− 0.090**	0.087**
ESS	0.076**	0.174**	− 0.042*	0.015
PSQI	− 0.112**	− 0.128**	0.012	− 0.053**
Sleep latency (min)	− 0.029*	− 0.085**	0.040*	− 0.011
Sleep efficiency (%)	0.112**	0.130**	0.028†	0.107*
Stage 3 NREM (%)	− 0.020	− 0.178**	0.128**	0.091**
Stage REM (%)	0.020	− 0.052**	0.065**	0.075**
Supine sleep time percentage (%)	− 0.033*	0.097**	− 0.056**	− 0.105**
Apnea–hypopnea index (/h)	0.137**	0.741**	− 0.414**	− 0.125**

ESS, Epworth Sleepiness Scale; PSQI, Pittsburgh Sleep Quality Index; NREM, non-rapid eye movement; REM, rapid eye movement.

*P < 0.05, **P < 0.001.