Table 1.
Clinical information and polysomnography data of all 15 subjects included in the analysis.
| Item | Median [25–75% interquartile range] or percentage |
|---|---|
| Age (year) | 52 [40–58] |
| Sex (female %) | 86.7% |
| BMI (kg/m2) | 22.6 [21.1–23.3] |
| RLS features | |
| Symptom duration (years) | 20 [10–25] |
| Symptom frequency (/week) | 6.5 [4.5–6.5] |
| IRLS score | 32 [27–34] |
| Ferritin (ng/mL) | 128.8 [23.8–172.6] |
| Questionnaires | |
| ESS | 6 [4–9] |
| ISI | 20 [15–24] |
| PSQI | 15 [9–17] |
| BDI-II | 16 [9–27] |
| PSG parameters | |
| TIB (min) | 432 [404–447] |
| TST (min) | 352 [311–386] |
| SE (%) | 83.3 [70.3–91.3] |
| SL (min) | 9.0 [2.8–26.5] |
| WASO (min) | 56.3 [32.5–86.9] |
| N1 (%) | 17.1 [13.9–25.2] |
| N2 (%) | 38.7 [33.4–49.0] |
| N3 (%) | 16.9 [10.4–25.4] |
| R (%) | 19.2 [16.6–22.0] |
| AHI (/hr) | 1.5 [0.4–6.0] |
| Arousal index (/hr) | 21.3 [17.4–25.9] |
| PLMSI (/hr) | 10.5 [6.5–35.1] |
| PI | 0.58 [0.40–0.72] |
| Mean IMI (s) in PLMS | 36.7 [32.9–39.9] |
- Abbreviations: BMI, body mass index; RLS, restless legs syndrome; IRLS, International RLS Study Group rating scale; ESS, Epworth Sleepiness Scale; ISI, Insomnia Severity Index; PSQI, Pittsburgh Sleep Quality Index; BDI-II, Beck Depression Inventory II; PSG, polysomnography; TIB, time in bed; TST, total sleep time; SE, sleep efficiency; SL, sleep latency; WASO, wake-up after sleep onset; AHI, apnea-hypopnea index; PLMSI, periodic leg movement during sleep index; PI, periodicity index; IMI, inter-movement interval.