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Predictors of 30-day hospital readmission after coronary artery bypass
R D Stewart1, C T Campos, B Jennings
1Division of Cardiothoracic Surgery, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.
Insights
Female gender and diabetes significantly increase 30-day readmission risk after coronary artery bypass grafting (CABG). These factors double the risk, highlighting key predictors for post-CABG readmission.
Area of Science:
- Cardiovascular Surgery
- Health Services Research
Background:
- Established risk factors for 30-day hospital readmission after coronary artery bypass grafting (CABG) remain unclear.
- Understanding these predictors is crucial for improving patient outcomes and reducing healthcare costs.
Purpose of the Study:
- To identify and establish risk factors associated with 30-day hospital readmission following isolated primary coronary artery bypass grafting (CABG).
Main Methods:
- A prospective cohort study followed 485 consecutive patients undergoing isolated primary CABG.
- Patient readmission status was determined via telephone contact at 30 days post-operation.
Main Results:
- The overall 30-day readmission rate was 16% (76/485 patients).
- Female gender (25% vs. 11%) and diabetes (22% vs. 12%) were significantly associated with higher readmission rates.
- Congestive heart failure showed a trend towards increased readmission (22% vs. 14%, p=0.09).
Conclusions:
- Female gender and diabetes are key predictors, more than doubling the risk of 30-day readmission after CABG.
- Traditional postoperative mortality risk factors do not necessarily correlate with increased readmission rates.
- These findings emphasize the need for targeted interventions for high-risk patient groups.
Background:
Risk factors for 30-day hospital readmission following coronary artery bypass grafting (CABG) have not been established.
Methods:
We prospectively followed 485 consecutive patients who underwent isolated primary CABG at our institution in 1997. Patients were contacted by telephone at 30 days following operation to determine readmission status.
Results:
The overall readmission rate was 16% (76 of 485). Female gender (25% versus 11%, p = 0.001) and diabetes (22% versus 12%, p = 0.005) were associated with significantly higher readmission rates. The relationship between female gender and readmission persisted after correcting for age and other comorbidities. Congestive heart failure trended towards a significant relationship with increased readmission rate (22% versus 14%, p = 0.09). There were no significant associations between 30-day readmission rate and age, hypertension, chronic obstructive pulmonary disease, history of myocardial infarction, peripheral vascular disease, creatinine level of > or = 1.4 mg/dL, or decreased left ventricular ejection fraction (< 40%).
Conclusions:
These data show that most of the classic risk factors for postoperative mortality are not necessarily associated with increased readmission. However, female gender and diabetes are associated with greater than twice the risk of 30-day readmission following CABG.