Table 2.

Case-control studies: are patients who are rehospitalized compared to those who are not rehospitalized more likely to have dementia/cognitive impairment?

Authors	N	Sample characteristics	Likelihood of cognitive impairment or dementia diagnosis related to readmission
Zanocchi et al. [18]	839	Patients ≥75 years of age discharged from a geriatric unit	Readmission within 3 months not related to dementia diagnosis
Bellelli et al. [19]	1,072	Patients ≥65 years of age discharged from rehabilitation unit	Readmission within 12 months not related to MMSE score
Ono et al. [20]	326	Patients discharged from dementia unit	Readmission within 24 months not related to cognitive status, as measured by Hasegawa's Dementia Scale
Watson et al. [21]	729	Patients discharged with primary dx of heart failure	Readmission within 3 months not related to dementia diagnosis
Dagani et al. [22]	329	Patients ≥64 years of age discharged from a geriatric unit	Readmission within 6 months not related to cognitive status, as measured by MMSE
Bottle et al. [23]	70,108	Patients discharged with primary diagnosis of heart failure extracted from the National Hospital Administrative Data for England	Readmission within 1 month not related to dementia diagnosis
Aljishi et al. [24]	197	Patients discharged from a general medicine unit	Readmission within 1 month not related to dementia diagnosis

MMSE, Mini-Mental State Examination; dx, diagnosis.