Table 2.
Characteristics of PLMW and PLMS and cardiac activation related to PLMS in patients with NC and control subjects
| Polysomnographic parameter | Patients with NC | Control subjects | P value |
|---|---|---|---|
| n = 14 | n = 14 | ||
| PLMW index | 89.8 ± 45.8 | 51.1 ± 37.8 | 0.02 |
| PLMS index | |||
| Total | 30.8 ± 13.3 | 43.6 ± 16.6 | 0.05 |
| In NREM sleep | 31.9 ± 12.0 | 49.2 ± 19.1 | 0.02 |
| In REM sleep | 29.2 ± 28.5 | 21.4 ± 33.4 | 0.3 |
| PLMS-MA index | 3.5 ± 2.1 | 4.8 ± 4.9 | 0.9 |
| PLMS associated with MA, % | 14.3 ± 11.9 | 11.8 ± 13.6 | 0.2 |
| Mean cardiac activation amplitude for PLMS, beats/min | |||
| Without MA | 5.7 ± 2.6 | 10.5 ± 3.1 | 0.0007 |
| With MA | 8.6 ± 4.5 | 13.4 ± 4.1 | 0.009 |
Data are presented as mean ± SD. PLMS refers to periodic limb movements during sleep; PLMW, periodic limb movements during wakefulness; NC, narcolepsy-cataplexy; NREM, non-rapid eye movement sleep; REM, rapid eye movement sleep; MA, microarousals.