Quantitative Weighting of Postoperative Complications Based on the Accordion Severity Grading System: Demonstration of Potential Impact Using the American College of Surgeons National Surgical Quality Improvement Program

To quantify severity of postoperative complications based on the Accordion Severity Grading System, determine the ability of severity grading to enhance National Surgical Quality Improvement Program (NSQIP) data, and develop an aggregate measure of severity of complications (the postoperative morbidity index).Forty-three surgical experts rated case vignettes containing postoperative complications on a severity scale. Vignettes were based on the...