Note. An OR more than 1 indicates a higher rate of potentially preventable readmission (PPR) compared with Whites and an OR less than 1 indicates a lower rate. Statistically significant (p < .05) differences in unadjusted models are indicated by darker shading. Significant differences from the multivariable model are indicated with an asterisk. In multivariable models adjusting for all study variables except the three comorbidity measures (payer, county of residence, discharge year, admission type, hospital, and age group/gender/ethnicity interactions).