Table 2.5.
West Haven Semi-quantitative classification
| Grade | Symptom | Operation definition |
|---|---|---|
| 0 | No abnormality seen | |
| Minimal HE | Abnormal results on neuropsychological tests | Two or more tests PHES>2SD |
| Normal examination | ICT > 5 | |
| Abnormal results on psychometric tests | CF ≤ 39 Hz | |
| 1 | Trivial lack of awareness | Respond 7 animal names within 120 s |
| Euphoria or anxiety | Normally oriented in time and space | |
| Shortened attention span | ||
| Impaired performance of addition | ||
| 2 | Lethargy or apathy | Disoriented for time (at least 3 of the following are wrong: day, week, month, season, or year) |
|
Minimal disorientation in time or place Subtle personality change Inappropriate behavior | ||
| Impaired performance of subtraction | Normally oriented in space | |
| 3 | Somnolence to semi-stupor | Disoriented for space (at least 3 of |
| Gross disorientation | the following wrongly reported: country, state/region, city or place) | |
| Disoriented for time | ||
| GCS 8–14 | ||
| 4 | Coma (does not respond to verbal or noxious stimuli) | GCS < 8 |
PHES psychometric hepatic encephalopathy score, ICT inhibitory control test