TABLE 3—
Observed 30-Day and 180-Day Readmission Rates for Diabetes-Related Conditions and Risk-Adjusted Odds Ratios, by Payer and Race/Ethnicity: Healthcare Cost and Utilization Project, 1999
| Observed Readmission Rate, % | Risk-Adjusted Odds Ratioa (95% Confidence Interval) | |||
| 30-Day | 180-Day | 30-Day | 180-Day | |
| Private insurance (age = 18–64) | ||||
| Whiteb | 7.78 | 21.4 | 1.00 | 1.00 |
| Black | 6.76** | 20.2 | 0.93 (0.82, 1.05) | 1.01 (0.93, 1.09) |
| Hispanic | 8.93* | 23.1* | 1.13 (0.98, 1.30) | 1.12 (1.03, 1.23)* |
| Medicaid (age = 18–64) | ||||
| Whiteb | 11.08 | 32.5 | 1.00 | 1.00 |
| Black | 11.63 | 33.0 | 1.07 (0.95, 1.21) | 1.08 (1.00, 1.17) |
| Hispanic | 11.28 | 34.2* | 1.05 (0.92, 1.20) | 1.14 (1.05, 1.24)** |
| Medicare (age ≥65) | ||||
| Whiteb | 10.48 | 27.9 | 1.00 | 1.00 |
| Black | 11.06 | 30.7** | 1.04 (0.97, 1.12) | 1.12 (1.07, 1.18)** |
| Hispanic | 12.83** | 34.0** | 1.21 (1.12, 1.30)** | 1.29 (1.23, 1.36)** |
a The odds ratios were adjusted for patient demographic (age, sex), socioeconomic (income at zip code, rural/urban residence), and clinical characteristics (comorbidities, complications, emergency room admission, major surgical procedure, length of stay, discharge status) during the index admission; hospital attributes (number of beds, teaching status, ownership); and dummy variables for individual states. Full results of the final models are available from the authors. Data are from State Inpatient Databases for 5 states (California, Missouri, New York, Tennessee, and Virginia) of the Healthcare Cost and Utilization Project, Agency for Healthcare Research and Quality.
b White is the reference group for comparison and testing of statistical significance.
*P < .05; **P < .01.