Table 1.
Demographic Data and Polysomnography Indexes of the Examined Patient Groups
| PLMD | OSA | Normal PSG | P Value | |
|---|---|---|---|---|
| Demographic Data | ||||
| Subjects, no. | 8.0 | 7.0 | 9.0 | |
| Women, no. | 3.0 | 0.0 | 5.0 | |
| Age, y | 51.0 ± 4.6 | 57.4 ± 4.3 | 39.9 ± 4.6 | 0.06 |
| ESS, score | 9.9 ± 2.2 | 13.0 ± 2.6 | 8.4 ± 1.7 | 0.38 |
| BMI, kg/m2 | 25.1 ± 2.0 | 35.2 ± 3.3 | 26.5 ± 1.8 | 0.07 |
| Polysomnographic Findings | ||||
| TST, min | 364.5 ± 20.2 | 336.0 ± 26.0 | 375.0 ± 15.1 | 0.42 |
| Sleep latency, min | 11.9 ± 3.2 | 13.6 ± 10.1 | 9.8 ± 1.5 | 0.76 |
| REM latency, min | 112.8 ± 27.3 | 174.1 ± 41.8 | 125.0 ± 18.7 | 0.33 |
| Sleep efficiency, % | 84.3 ± 3.1 | 82.0 ± 6.9 | 91.1 ± 1.9 | 0.44 |
| Sleep stage, % of TST | ||||
| REM | 12.9 ± 1.5 | 8.7 ± 2.2 | 16.6 ± 1.6 | 0.045 |
| 1 | 17.1 ± 4.2 | 20.9 ± 2.7 | 12.5 ± 1.7 | 0.10 |
| 2 | 46.0 ± 1.9 | 50.6 ± 7.7 | 49.5 ± 3.3 | 0.72 |
| 3/4 | 10.3 ± 3.0 | 3.6 ± 1.8 | 13.6 ± 2.0 | 0.05 |
| PLMI, no./h | 64.0 ± 17.3 | 1.4 ± 0.9 | 1.4 ± 0.6 | < 0.001 |
| AHI, no./h | 4.5 ± 0.8 | 83.9 ± 7.4 | 4.2 ± 0.8 | 0.001 |
| SaO2, % | ||||
| Mean | 93.2 ± 0.6 | 88.9 ± 1.0 | 94.9 ± 0.6 | < 0.001 |
| Minimum | 85.5 ± 1.3 | 68.6 ± 2.9 | 87.9 ± 1.6 | < 0.001 |
| Mean heart rate, bpm | 63.6 ± 4.2 | 67.3 ± 5.3 | 62.9 ± 2.7 | 0.91 |
Data are presented as mean ± SD, except subjects and women, which are shown as total numbers; P values of statistical comparisons between the patient groups (Kruskal-Wallis tests) are shown. PLMD refers to periodic limb movement disorder; OSA, obstructive sleep apnea; PSG, polysomnography; ESS, Epworth Sleepiness Scale; BMI, body mass index; TST, total sleep time; REM, rapid eye movement sleep; PLMI, periodic limb movement index; AHI, apnea-hypopnea index; SaO2, oxygen saturation.