Table 1 Definition of subjective drowsiness level.
Level | Subjective drowsiness |
|---|---|
Lv.0 | Not sleepy |
Lv.1 | Not completely arousal but not drowsy |
Lv.2 | Drowsy |
Lv.3 | Drowsier than Lv.2 |
Lv.4 | Drowsier than Lv.3 |
• | • |
• | • |
• | • |
Level | Subjective drowsiness |
|---|---|
Lv.0 | Not sleepy |
Lv.1 | Not completely arousal but not drowsy |
Lv.2 | Drowsy |
Lv.3 | Drowsier than Lv.2 |
Lv.4 | Drowsier than Lv.3 |
• | • |
• | • |
• | • |
