Table 2.
Sleep parameters of patients with restless legs syndrome (RLS) and controls
| RLS | Controls | p | |
|---|---|---|---|
| TST (mean ± SD; min) | 370.7 ± 87.9 | 418.8 ± 57.9 | 0.01 |
| Sleep efficiency (%) | 74.5 ± 14.4 | 84.3 ± 8.8 | 0.002 |
| Sleep latency (mean ± SD; min) | 26.0 ± 25.7 | 16.5 ± 9.6 | 0.04 |
| Wake Index | 5.4 ± 2.3 | 4.9 ± 2.9 | NS |
| WASO (mean ± SD, min) | 89.0 ± 65.9 | 54.3 ± 43.0 | 0.01 |
| AHI (mean ± SD) | 1.3 ± 1.4 | 1.5 ± 1.3 | NS |
| PLMS-I (mean ± SD) | 26.9 ± 25.5 | 12.0 ± 13.4 | 0.004 |
| PLMSA-I (mean ± SD) | 4.5 ± 5.5 | 2.1 ± 3.7 | 0.03 |
| Arousal Index (mean ± SD) | 17.3 ± 9.5 | 14.2 ± 5.0 | NS |
| S1 (mean ± SD, % TST) | 17.6 ± 6.8 | 16.0 ± 8.5 | NS |
| S2 (mean ± SD, % TST) | 46.2 ± 8.1 | 49.3 ± 8.5 | NS |
| SWS (mean ± SD, % TST) | 17.2 ± 7.4 | 16.4 ± 8.9 | NS |
| REM (mean ± SD, % TST) | 17.9 ± 6.8 | 18.2 ± 6.1 | NS |
| Nocturnal SVB | 19.8 ± 7.8 | 19.8 ± 6.4 | NS |
| HR (mean ± SD) | 59.6 ± 8.4 | 62.0 ± 9.9 | NS |
TST total sleep time, WASO time of wake after sleep onset, AHI apnea/hypopnea index, PLMS-I periodic limb movements in sleep index, PLMSA-I periodic limb movements in sleep with arousal index, SVB sympathovagal balance, HR heart rate, SD standard deviation