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Published on: June 11, 2012
Preoperative glycated hemoglobin as a predictor of infection in patients undergoing spinal surgery: A retrospective
Paul Karim1, Jiahui Chen2, Isaac Huang3
1Department of Anesthesiology, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, United States of America.
Objective:
To investigate whether elevated preoperative glycated hemoglobin (HbA1c) levels predict postoperative infections and related clinical outcomes following spinal surgery.
Design:
Retrospective cohort analysis utilizing the publicly available MIMIC-IV database.
Setting:
Single-center academic medical institution with intensive care capability.
Patients:
A total of 246 adult patients undergoing spinal surgery with recorded preoperative HbA1c levels.
Interventions:
None.
Measurements:
The primary outcome was clinician-suspected postoperative infection within 24 h after surgery, defined by culture orders plus antibiotic initiation. Secondary outcomes included Sepsis-3 criteria-defined sepsis, SIRS sepsis, septic shock, and hospital length of stay.
Main Results:
Elevated preoperative HbA1c (≥6.5 %) was independently associated with significantly increased odds of clinician-suspected postoperative infection (OR 3.20; 95 % CI 1.22-8.36; p = 0.018), after controlling for comorbidity burden and surgical complexity. However, elevated HbA1c did not independently predict more severe outcomes such as Sepsis-3 sepsis or septic shock.
Conclusions:
Elevated preoperative HbA1c substantially increases the likelihood of early clinician suspicion and empirical treatment of postoperative infections after spinal surgery. Routine HbA1c screening should therefore be considered during preoperative evaluations, especially for elective instrumented spinal procedures known for higher infection risks. While these findings support existing clinical guidelines recommending perioperative glycemic optimization, elevated HbA1c alone may not predict severe infection or septic complications once comorbidity burden is considered.
Insights
Elevated preoperative glycated hemoglobin (HbA1c) levels significantly increase the risk of early postoperative infections after spinal surgery. Routine HbA1c screening is recommended for patients undergoing spinal procedures to identify at-risk individuals.
Area of Science:
- Spinal Surgery
- Infectious Disease
- Endocrinology
Background:
- Postoperative infections are a significant concern in spinal surgery.
- Glycemic control, indicated by glycated hemoglobin (HbA1c), is crucial for patient outcomes.
Purpose of the Study:
- To determine if elevated preoperative HbA1c predicts postoperative infections.
- To assess the association between preoperative HbA1c and clinical outcomes after spinal surgery.
Main Methods:
- Retrospective cohort analysis of 246 adult patients from the MIMIC-IV database.
- Patients underwent spinal surgery with recorded preoperative HbA1c levels.
- Primary outcome: clinician-suspected postoperative infection within 24 hours; Secondary outcomes: sepsis, septic shock, hospital length of stay.
Main Results:
- Elevated preoperative HbA1c (≥6.5%) was independently associated with a 3.20-fold increased odds of postoperative infection.
- No independent association was found between elevated HbA1c and severe outcomes like Sepsis-3 sepsis or septic shock.
- Results were adjusted for comorbidity burden and surgical complexity.
Conclusions:
- Elevated preoperative HbA1c significantly increases the likelihood of early postoperative infection suspicion and treatment.
- Routine HbA1c screening in preoperative evaluations is recommended, particularly for elective instrumented spinal procedures.
- While supporting glycemic optimization, elevated HbA1c alone may not predict severe septic complications when comorbidity burden is considered.
