Military Surgeon Volume and Stress Incontinence Surgery Complications: A Retrospective Cohort Study.

Study Objective: To compare 12-month postoperative complication rates in women who underwent sling procedures by high-volume versus low-volume surgeons at US military treatment facilities (MTFs).

Design: Retrospective cohort study (Canadian Task Force classification II-2).

Setting: US MTFs.

Patients: Female military beneficiaries enrolled in TRICARE.

Interventions: Sling surgery for stress urinary incontinence between January 1, 2011 and December 31, 2012.

Measurements And Main Results: The primary exposure was surgeon volume (high vs low). Surgeon volume was categorized as high or low based on the number of slings performed in the previous 2 years at US MTFs (January 1, 2009 to December 31, 2010). The primary outcome was a composite variable indicating at least 1 postoperative complication within 12 months. We used International Classification of Diseases, 9th revision and Current Procedural Terminology codes to identify postoperative complications that occurred in the 12 months after the index sling procedure. During the study period 348 gynecologic and urologic surgeons performed 1632 slings. The average patient age was 47.2 years. Based on our data distribution we classified surgeons as high volume (>12 slings/2 years) or low volume (<4 slings/2 years). High-volume surgeons operated on patients who were older, more likely to have comorbidities, and more likely to receive concomitant prolapse surgery. Using a cluster analysis the overall likelihood of at least 1 postoperative complication in 12 months for high-volume versus low-volume surgeons was 48.4% versus 42.2% (adjusted odds ratio, 1.24; 95% confidence interval, .99-1.54; p = .06). There were no differences between high- and low-volume surgeons in the rate of almost all other postoperative complications.

Conclusion: No significant differences in 12-month complication rates after sling surgery, stratified by surgeon volume, were seen in a setting of overall low-volume military surgeons.