Table 2.
Patient characteristics and results of overnight PSG
| Number of patients | 30 |
| Sex (F/M) | 19/11 |
| Age (years) | 37.1±13.6(19–65) |
| Body mass index (kg/m2) | 27.6±5.3 (19–37) |
| Idiopathic hypersomnia/no pathology | 13/17 |
| Epworth scale | 15.2±3 (11–21) |
| Medications before PSG | |
| No meds | 20 |
| Antidepressants | 6 |
| Benzodiazepines (clonazepam) | 2 |
| Hypnotics (zopiclone) | 3 |
| Nonsteroidal anti-inflammatories | 6 |
| Opiates (morphine, oxycodone) | 2 |
| Total sleep time (minutes) | 321±75 (143–443) |
| Sleep efficiency (%) | 75±17 (34–97) |
| Sleep onset (minutes) | 18±15 (1–71) |
| REM latency (minutes) | 189±89 (64–424) |
| Stage N1 (minutes) | 39±16 (15–71) |
| Stage N2 (minutes) | 172±49 (75–301) |
| Stage N3 (minutes) | 65±49 (0–159) |
| Stage REM (minutes) | 44±25 (0–91) |
| Arousal index (hour–1) | 28±12 (12–54) |
| Apnea–hypopnea index (hour–1) | 1.8±1.5 (0–5.9)a |
| Oxygen saturation (%) | 96±1 (94–98) |
| PLM index (hour–1) | 9.5±13 (0–46)b |
| PLM index with arousal (hour–1) | 2.4±2.8 (0–12) |
| Odds ratio product | |
| Wake | 2.1±0.1 (1.8–2.3) |
| N1 | 1.3±0.4 (0.6–1.9) |
| N2 | 1.0±0.5 (0.3–1.8) |
| N3 | 0.5±0.4 (0.1–1.1) |
| REM | 1.0±0.5 (0.5–2.1) |
Notes: Data given as mean ± standard deviation (range).
a
Only one patient >5 hour–1.
b
Six patients >15 hour–1.
Abbreviations: F, female; M, male; PSG, polysomnography; REM, rapid eye movement; PLM, periodic leg movement.