Skip to main content

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