Subsumed surgery shows no significant difference in outcomes.

A comprehensive analysis involving 871,441 surgical procedures revealed that subsumed surgeries, completed during noncritical portions of overlapping procedures, yield similar postoperative outcomes to non-overlapping surgeries. Initial univariate data indicated a higher 30-day readmission risk and reoperation rates for subsumed surgeries. However, when matched for demographics and procedural variables, no significant differences emerged in outcomes among similar patients treated by the same surgeon. This challenges prior assumptions about the safety of subsumed surgery.