Recent Insights on Prevalence and Corelations of Hypoactive Delirium

Table 2

HD in consultation-liaison psychiatry.

Study	, mean age in years	Diagnosis of delirium	Subtyping	Summary of findings
Singh et al., 2009 [28]	32,; mean age not available, most cases >60 years	ICD-10	Liptzin and Levkoff criteria	6.25% HD
Sagawa et al., 2009 [29]; (this study involved cancer patients that had been admitted in general medical wards)	100,; 68	DRS-R-98	Liptzin and Levkoff criteria	14% HD; Motor subtypes of delirium were not associated with any of the examined etiological factors (inflammation, dehydration and sodium abnormality, metabolism abnormality, benzodiazepine use, etc.)
Mushtaq et al., 2014 [30]	40,; 27.8	MMSE, MDAS	No specific scale	30% HD; HD patients had more cognitive disturbances compared to hyperactive patients
Grover et al., 2014 [31]	321,; 49	DRS-R-98	DMSS	19.9% HD; Perceptual disturbances, delusions, and lability of affect were significantly less common in HD patients, compared to the hyperactive or mixed delirium group. There were no significant differences for the cognitive symptoms in DRS-R-98 across the different motor subtypes; HD patients significantly less frequently received psychotropic medications, compared to patients with other delirium subtypes

ICD-10: International Classification of Disease.
MMSE: Minimental State Examination.
MDAS: Memorial Delirium Assessment Scale.
DMSS: Delirium Motor Subtype Scale.
DRS-R-98: Delirium Rating Scale-Revised-98.
HD: hypoactive delirium.