Sleep quality, subclinical insomnia and daytime sleepiness thresholds in association with age, body composition and overall sleep assessment scores
| Pittsburgh Sleep Quality Index (PSQI) | Insomnia Severity Index (ISI) | Epworth Sleepiness Scale (ESS) | |||||||
| PSQI<5 (n=35) | PSQI≥5* (n=76) | P value | ISI<11 (n=81) | ISI≥11† (n=30) | P value | ESS≤8 (n=83) | ESS>8‡ (n=25) | P value | |
| Age | 23.4±4.9 | 23.9±4.8 | 0.611 | 24.2±5.0 | 22.5±4.2 | 0.100 | 24.2±5.0 | 22.4±4.2 | 0.117 |
| Body fat (%) | 20.3±3.8 | 20.7±4.7 | 0.658 | 20.5±4.4 | 20.9±4.6 | 0.686 | 20.6±4.5 | 20.6±4.3 | 0.997 |
| Boyd mass index | 22.4±1.5 | 22.9±2.2 | 0.270 | 23.0±2.0 | 22.1±2.1 | 0.054 | 23.0±1.9 | 21.8±2.4 | 0.008 |
| Total sleep time (hours) | 8.5±1.2 | 7.8±1.6 | 0.045 | 8.0±1.4 | 8.0±1.7 | 0.943 | 7.9±1.4 | 8.2±1.8 | 0.472 |
| PSQI score | 3.04±0.8 | 6.6±1.7 | <0.001 | 5.1±1.9 | 6.9±2.1 | <0.001 | 5.3±2.1 | 6.7±1.8 | 0.002 |
| ISI score | 4.0±3.7 | 8.4±4.9 | <0.001 | 4.6±3.3 | 13.3±2.4 | <0.001 | 6.10±4.7 | 10.1±4.5 | <0.001 |
| ESS score | 5.0±3.7 | 6.2±3.9 | 0.129 | 5.1±3.7 | 7.8±3.7 | <0.001 | 4.3±2.6 | 11.0±2.3 | <0.001 |
*PSQI≥5: Poor sleep quality.
†ISI≥11: Subthreshold insomnia.
‡ESS>8: Excessive daytime sleepiness.