Table 3.

Severity of cognitive impairment and functional status for patients with dementia admitted to the ICU or non-ICU hospital settings

Variables	ICU (n = 5,571)	Non-ICU (n = 60,325)	P value
Severity of cognitive impairment, n (%)
Minimal Moderate Severe Missing	2,923 (52.5%) 1,955 (35.1%) 693 (12.4%) < 5 (0.0%)	27,697 (45.9%) 22,534 (37.4%) 10,092 (16.7%) 0 (0.0%)	< 0.001
ADLs, n (%)
Independent Minimal assistance Extensive assistance Dependent Missing	905 (16.2%) 1,485 (26.7%) 2,217 (40.0%) 964 (17.3%) < 5 (0.0%)	8,853 (14.7%) 16,533 (27.5%) 24,253 (40.2%) 10,684 (17.7%) 0 (0.0%)	0.022
IADLs, n (%)
No difficulty Minimal difficulty Significant difficulty Missing	18 (0.3%) 129 (2.3%) 2,193 (39.4%) 3,231 (58.0%)	148 (0.2%) 1,399 (2.3%) 11,842 (41.7%) 33,619 (55.7%)	< 0.001
CHESS scale, n (%)
No health instability Mild-moderate instability Severe health instability Missing	1,522 (27.3%) 3,702 (66.5%) 347 (6.2%) < 5 (0.0%)	15,235 (25.3%) 41,374 (68.6%) 3,711 (6.2%) 0 (0.0%)	< 0.001

Notes: Dementia severity and ADL, IADL, and CHESS scoring defined in Additional File Table 5