Table 3.

Decomposition Results of Racial and Ethnic Disparities in Preventable Hospitalizations Among Patients With Alzheimer’s Disease

Variable	Whites vs African American patients	White vs Latinx patients
Predicted preventable hospitalization rate among AD patients	10.3% (African American)	10.1% (Latinx)
	8.4% (White)	8.4% (White)
Difference in the preventable hospitalization rate	1.8%	1.7%
Percent of the difference explained	9.1%	9.8%
Significant factors, % contributed to the difference
Hospital ACO affiliation	3.01%**	–
Patient’s age ≥75 years	−5.81%**	–
Patient’s number of chronic conditions	−6.41%*	−52.6%***
Large bed size	–	−3.56%*
State	15.91%*	28.07%*

Notes:

^*p<0.05;

^**p<0.01;

^***p<0.001.

Decomposition is a regression-based analysis. Stratified analysis by race and ethnicity was conducted first. Results (Appendix) showed that marginal effect of ACO affiliation was −1.6% for white (p=0.003), 3.1% for African American (p=0.054), and 0.01% (p=0.607) for Latinx AD patients. The decomposition then rearranged the terms of these stratified analyses in pair (White vs African American, White vs. Latinx) to indicate (1) the portion of the difference due to observed population characteristics (i.e., all of the control variables, such as the hospital ACO affiliation), and (2) the portion of the difference due to unobserved heterogeneities.

AD, Alzheimer Disease; ACO, accountable care organization.