Table 3 Classification of CTE according to the WHO
From: Health risks in international container and bulk cargo transport due to volatile toxic compounds
| Symptoms | Cognitive defects | Neurological abnormalities | |
|---|---|---|---|
| Class I | Fatigue, diminished memory, concentration and initiative | No objective dysfunction | No objective abnormalities |
| Organic affective syndrome | Change in personality. Poor impulse control, lowered mood and motivation, irritability, anxiety, emotional lability | ||
| Class II | Difficulties in concentration and attention, impairment of memory, decrease in learning capacity | Objective evidence of cognitive impairment | Minor neurological signs |
| Mild chronic toxic encephalopathy | |||
| Class III | Marked global deterioration in intellect and memory | Marked global deterioration in intellect and memory | Neurological signs and/or neuroradiological abnormal findings |
| Severe chronic toxic encephalopathy |