Elevated Hb A1C level and revisional bariatric surgery complications

Area of Science:

• Metabolic and Bariatric Surgery
• Surgical Outcomes Research
• Diabetes Management in Surgical Patients

Background:

• Elevated hemoglobin A1C (HbA1C) is a known risk factor for postoperative complications.
• Previous research on HbA1C and bariatric surgery outcomes has primarily focused on primary procedures.
• The impact of elevated HbA1C on outcomes in the higher-risk revisional bariatric surgery cohort remains understudied.

Purpose of the Study:

• To evaluate the association between elevated preoperative HbA1C levels and early postoperative complications in patients undergoing revisional bariatric surgery.
• To determine if specific HbA1C thresholds (≤8% and ≤10%) are predictive of adverse outcomes in this patient group.

Main Methods:

• Retrospective analysis of the Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) database (2017-2018).
• Inclusion of patients undergoing revisional bariatric surgery.
• Comparison of complication rates between HbA1C groups (≤8% vs. >8% and ≤10% vs. >10%) using propensity score matching (PSM).

Main Results:

• A total of 16,234 patients were analyzed.
• After PSM, no significant difference in the composite outcome of all complications was observed between HbA1C groups (P = .22 for ≤8% vs. >8%; P < .46 for ≤10% vs. >10%).
• Individual complication rates, including surgical-site infections, cardiopulmonary issues, and readmissions/reinterventions, were similar across HbA1C thresholds.

Conclusions:

• Elevated preoperative HbA1C levels (>8% or >10%) are not associated with increased early postoperative complications in patients undergoing revisional bariatric surgery.
• These findings challenge the conventional understanding of HbA1C as a universal predictor of surgical risk in this specific population.
• Further prospective studies are warranted to confirm these results and refine risk stratification strategies.