Assessment of symptoms and side effects when waking after the sham stimulation and active treatment nights, as measured by a visual analogue scale (0–10 points)—higher scores indicate an improvement
| Parameters | Sham stimulation | Active treatment | p Value |
|---|---|---|---|
| Feeling refreshed | 5.7 (2.7–7.2) | 6.6 (2.2–8.5) | 0.40 |
| Sleep quality | 5.6 (2.9–7.1) | 6.4 (2.4–8.0) | 0.28 |
| Mouth dryness | 4.4 (2.2–8.5) | 7.4 (4.9–9.7) | 0.007 |
| Tongue unpleasant sensation | 9.9 (9.4–10.0) | 9.9 (9.4–10.0) | 0.63 |
| Morning headache | 9.4 (6.3–10.0) | 9.9 (8.1–10.0) | 0.27 |
| Skin discomfort | 9.9 (9.5–10.0) | 9.9 (9.7–10.0) | 0.95 |
| Sleepiness* | 3.0 (2.0–3.5) | 3.0 (2.0–3.0) | 0.29 |
*Sleepiness was assessed in the mornings using the Stanford Sleepiness Scale to pick up ad-hoc changes. All variables are presented as median and IQR.