Hospital readmission after ovarian cancer surgery: Are we measuring surgical quality?

OBJECTIVES: Readmission after surgery is a quality metric hypothesized to reflect the quality of care in the index hospitalization. We examined the link between readmissions and a surrogate of surgical quality - major postoperative complication - among ovarian cancer patients.

METHODS: Patients who underwent surgery for ovarian cancer between 2012 and 2013 were identified from the National Surgical Quality Improvement Project (NSQIP). Major complications were defined as grade 3 or ≥complications on the validated Claviden-Dindo scale and included both NSQIP and non-NSQIP defined complications based on readmission ICD-9 code. Readmissions and complications within 30-days of surgery were analyzed using rate ratios and modified Poisson regression.

RESULTS: We identified 2806 ovarian cancer patients of whom 9.1% (n=259) experienced an unplanned readmission. Overall major complication rate was 10.9% (n=307). Major complications in the index hospitalization were not associated with subsequent readmission (RR 1.2, 95% CI 0.7-1.9). Overall, 41.4% of readmissions were not attributable to any major postoperative complication. Of the unplanned readmissions, 55.2% (n=143) never experienced a NSQIP-defined major complication. Of these 143 patients, the reason for readmission was known for 107 patients and was: 28.0% non-NSQIP-defined major complications; 16.8% cancer or other medical factors; 22.4% minor complications; and 32.7% symptoms without a diagnosis of complication.

CONCLUSIONS: Forty percent of unplanned readmissions after ovarian cancer surgery occur among patients who have not experienced a major postoperative complication. Quality metric benchmarks and efforts to decrease readmissions should account for this high percentage of readmissions not associated with a major complication.