"Every minute counts": association between operative time and post-operative complications for patients undergoing minimally invasive sacrocolpopexy

Introduction and hypothesis: Our aim was to assess whether operative time is independently associated with post-operative complications for minimally invasive sacrocolpopexy (MISCP).

Methods: Using the National Surgical Quality Improvement Program (NSQIP) database, patients undergoing MISCP from 2015 to 2020 were identified by CPT code. The following data were extracted: demographics, concomitant procedures (hysterectomies, midurethral sling, and anterior or posterior repair), and post-operative complications. Complications were categorized into minor, major, and composite, modeled after the Clavien-Dindo classification. For analysis, covariates associated with operative time and composite complications were identified using a general linear model and Chi-squared or Fisher's exact test as appropriate. Then, adjusted spline regression was performed as a test of nonlinearity between operative time and composite complications. Adjusted relative risks of complications by 60-min increments were estimated using Poisson regression with robust error variance.

Results: A total of 13,239 patients who underwent MISCP were analyzed. Overall, mean operative time (SD) was 189.5 (78.3) min. Post-operative complication rates were 2.6% for minor, 4.7% for major, and 7.3% for composite complications. Age, smoking, and sling were the only covariates associated with both operative time and post-operative complications. Adjusted spline regression demonstrated linearity (p<0.0001). With each 60-min increase in operative time, adjusted relative risks (95% CI) were 1.14 for composite (1.09, 1.19), 1.16 for minor (1.10, 1.21), and 1.11 (1.03, 1.20) for major complications.

Conclusions: Operative time is independently and linearly associated with post-operative complications for patients undergoing MISCP, even when adjusted for demographic variables and concomitant procedures.