Table 3.

Variables present in each scale

Scale	Number of variables	Signs and symptoms evaluated
Delirium Detection Score (DDS)	8 items	Orientation Agitation Anxiety Hallucinations Seizures Paroxysmal sweating Sleep-wake cycle Tremors
Cognitive Test of Delirium (CTD)	5 items	Attention/Orientation Vigilance Comprehension Memory
Memorial Delirium Assessment Scale (MDAS)	10 items, divided in 2 groups (1st with 4 items and the 2nd with 6 items)	Attention/Orientation Immediate memory Behavior Perception Sleep-wake cycle Hallucinations Delusions Thinking alterations
Intensive Care Delirium Screening Checklist (ICDSC)	8 items	Attention/Orientation Hallucinations Consciousness level Psychomotor agitation Alterations of language and behavior Sleep-wake cycle Fluctuating pattern of symptoms
The Neelon and Champagne Confusion Scale (NEECHAM)	9 items, divided in 3 sub-scales	Attention/Orientation Obedience to commands Behavior (motor and verbal pattern and appearance) Physiological condition (vital signs, oxygen saturation and urinary incontinence)
Delirium Rating Scale-Revised-98 (DRS-98-R)	16 items, 3 of them used only for diagnosis and the other 13 for stratification	Attention/Orientation Onset of symptoms Fluctuating nature Associated factors Sleep-wake cycle Immediate and delayed memory Illusions and hallucinations Delusions Emotional liability Language Disorders of thought Agitation or degradation Visual and special ability