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Published on: March 27, 2018
HbA1c predicts length of stay in patients admitted for coronary artery bypass surgery
M Medhi1, M C Marshall, H B Burke
1Department of Medicine, New York Medical College and Westchester Medical Center, Valhalla, New York 10595, USA.
Insights
High blood sugar, measured by HbA1c, predicts longer hospital stays for patients undergoing coronary artery bypass surgery. This finding highlights HbA1c as a key indicator for predicting recovery duration after cardiac procedures.
Area of Science:
- Cardiology
- Endocrinology
- Health Services Research
Background:
- Diabetes mellitus is a significant risk factor for coronary artery disease (CAD).
- Diabetic patients frequently require coronary artery bypass graft (CABG) surgery.
- Glycemic control, reflected by HbA1c, impacts diabetic morbidity and mortality.
Purpose of the Study:
- To investigate the relationship between preoperative HbA1c levels and postoperative length of stay (LOS) in patients undergoing CABG surgery.
- To determine if HbA1c is a predictor of extended hospitalization after CABG.
Main Methods:
- A cohort of 135 patients undergoing CABG surgery was analyzed.
- Preoperative HbA1c levels were measured, with 7% used as a threshold for uncontrolled hyperglycemia.
- Postoperative LOS was categorized as <6 days or >=6 days (extended LOS).
- Linear and logistic regression analyses, adjusted for age, were employed to assess the association between HbA1c and LOS.
Main Results:
- An HbA1c level of 7% or greater was identified as a strong predictor of an extended postoperative length of stay (>=6 days).
- The study found a significant association between poor glycemic control and prolonged hospitalization post-CABG.
Conclusions:
- Preoperative HbA1c levels can serve as a surrogate marker for predicting prolonged hospitalization after coronary artery bypass surgery.
- Elevated HbA1c may indicate underlying cardiac and noncardiac morbidities that extend recovery time.
Abstract:
Diabetes mellitus is associated with coronary artery disease, and diabetic patients are frequently referred for coronary bypass graft surgery. It is well known that HbA1c, which reflects long-term glycemic control, is related to diabetic morbidity and mortality. It is not known whether HbA1c is related to postoperative length of stay among patients who undergo coronary artery bypass surgery. The authors evaluated 135 patients who underwent bypass surgery at the Westchester Medical Center (Valhalla, NY). HbA1c was measured in all patients preoperatively; a value of 7% or greater was used as a threshold for uncontrolled hyperglycemia. A postoperative length of stay of 6 days or more was used as the cutoff for an extended length of stay. Linear regression was used to assess the relationship between HbA1c, adjusted for age, and length of stay in days. Logistic regression, with length of stay a binary variable <6, > or =6 days, was used to assess the accuracy of HbA1c <7%, > or =7%, adjusted for age, in predicting length of stay. An HbA1c of 7% or greater was found to be a strong predictor of a length of stay of 6 days or longer. These data suggest that HbA1c can be used as a surrogate marker for cardiac and noncardiac morbidity that prolongs hospitalization after coronary artery bypass surgery.
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