Table 3.

Population characteristics of the 40 PICU cases with delirium, 2002–2005

Characteristics	Frequency (total n = 40)
Age (mean ± SD)	7.6 ± 5.9
Male
n	25
age (mean ± SD)	7.6 ± 6.1
Female
n	15
age (mean ± SD)	7.6 ± 5.8
Ethnicity
White	36 (90%)
African	3 (7.5%)
Asian	1 (2.5%)
Mechanical ventilation	34 (85%)
PIM score (mean ± SD)	9.96 ± 16.20
PRISM score (mean ± SD)	23.54 ± 24.94
Major somatic pharmacological features
Recent increase or decrease of analgosedative medication	22 (55%)
Neurological disorders	21 (52%)
Infectious disorders	20 (50%)
Respiratory disorders	12 (30%)

PIM, Pediatric Index of Mortality; PRISM, Pediatric Risk of Mortality