Table 3 Correlation between the snoring parameters and polysomnography parameters.

From: Definition of the snoring episode index based on the analyses of snoring parameters and the apnea hypopnea index

 

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**

  1. ESS, Epworth Sleepiness Scale; PSQI, Pittsburgh Sleep Quality Index; NREM, non-rapid eye movement; REM, rapid eye movement.
  2. *P < 0.05, **P < 0.001.
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