Table 2.

Unadjusted and logistic regressions for in-hospital mortality across categories of information sharing among Medicare beneficiaries with Alzheimer disease in 2018. All analyses are compared to same-hospital readmission pairs. Each model includes readmission hospital fixed effects; robust standard errors are clustered at the level of the hospital. Model 1: demographics (age, sex, race) and clinical characteristics (frailty score, chronic condition count, reason for readmission, intensive care unit stay during readmission); model 2: hospital characteristics (urban/rural, size, ownership, type, teaching status, each for readmission hospital); model 3: full model.

	Unadjusted ORa,b (95% CI)	Model 1 (n=18,072), adjusted OR (95% CI)	Model 2 (n=18,157), adjusted OR (95% CI)	Model 3 (n=18,036), adjusted OR (95% CI)
Fragmented/same HIEc	0.72 (0.47-1.12)	0.61 (0.39-0.95)	0.72 (0.47-1.12)	0.61 (0.39-0.95)
Fragmented/different HIEs	1.07 (0.87-1.33)	1.01 (0.80-1.27)	1.09 (0.88-1.34)	1.02 (0.82-1.28)
Fragmented/no HIE participation	1.31 (0.99-1.73)	1.24 (0.92-1.66)	1.33 (1.01-1.75)	1.25 (0.93-1.68)

^aOR: odds ratio.

^bn=18,196.

^cHIE: health information exchange.