Table 3.

Unadjusted and logistic regressions for postdischarge 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=25,668), adjusted OR (95% CI)	Model 2 (n=25,772), adjusted OR (95% CI)	Model 3 (n=25,569), adjusted OR (95% CI)
Fragmented/same HIEc	1.00 (0.78-1.28)	0.95 (0.73-1.22)	1.00 (0.78-1.28)	0.95 (0.74-1.23)
Fragmented/different HIEs	1.13 (0.99-1.29)	1.11 (0.97-1.27)	1.13 (0.99-1.29)	1.11 (0.97-1.27)
Fragmented/no HIE participation	1.12 (0.94-1.33)	1.09 (0.91-1.31)	1.12 (0.94-1.33)	1.09 (0.91-1.31)

^aOR: odds ratio.

^bn=28,874.

^cHIE: health information exchange.