Table 2.
Comparison of polysomnographic variables between patients with primary SRED and those with drug-induced SRED
| Polysomnographic variables | Primary SRED (n=22) | Drug-induced SRED (n=5) | t-value | P-value |
|---|---|---|---|---|
| % N1 sleep | 10.2±4.6 | 7.4±3.0 | 1.28 | 0.21 |
| % N2 sleep | 52.9±11.8 | 62.5±5.7 | 1.76 | 0.091 |
| % N3 sleep | 6.8±5.4 | 1.4±1.3 | 2.15 | 0.041 |
| % REM sleep | 18.9±5.0 | 15.2±6.5 | 1.43 | 0.17 |
| TST, minutes | 449.0±68.2 | 460.4±113.5 | 0.30 | 0.77 |
| % WASO | 11.1±10.0 | 13.4±12.1 | 0.45 | 0.66 |
| Sleep efficiency, % | 86.7±10.8 | 82.2±12.7 | 0.81 | 0.42 |
| Arousal index | 14.1±5.0 | 10.9±2.9 | 1.37 | 0.18 |
| Sleep latency, minutes | 9.8±12.5 | 27.0±23.1 | 2.35 | 0.027 |
| REM latency, minutes | 90.9±72.7 | 162.3±155.1 | 1.58 | 0.13 |
| PLM index | 1.2±2.8 | 0.0±0.0 | 0.63 | 0.37 |
| AHI | 2.4±3.5 | 1.3±0.7 | 0.63 | 0.54 |
Notes: N1, stage 1 sleep; N2, stage 2 sleep; N3, deep sleep. Data presented as mean ± SD.
Abbreviations: AHI, apnea–hypopnea index; PLM, periodic limb movement; REM, rapid eye movement; SRED, sleep-related eating disorder; TST, total sleep time; WASO, wake after sleep onset.