TABLE 1

Delirium subtypes and features

Delirium subtypeFeatures
HyperactiveAgitation
Hypervigilance
Restlessness
Hallucinations
Thought disorganization
Elevated or irritable mood
Increased or loud speech
HypoactiveApathy
Staring
Lethargy
Decreased alertness
Psychomotor slowing
Reduced engagement in care
MixedFeatures of hyperactive and hypoactive subtypes

  • Based on information from reference 6.