Abstract
ObjectiveWe examined the influence of modifiable (intraoperative factors and complications) and non-modifiable (clinical and demographic characteristics) factors on length of stay (LOS) for women who underwent hysterectomy for uterine cancer. MethodsThe National Surgical Quality Improvement Program database was used to identify women who underwent hysterectomy for uterine cancer from 2006 to 2015. The association between demographic, preoperative, intraoperative, and postoperative factors and LOS was examined. The primary outcome was prolonged LOS (>75th an3 >90th percentiles). Model fit statistics were used to assess the importance of each group of characteristics. ResultsOf 19,084 women identified, 6082 (31.9%) underwent abdominal and 13,002 (68.1%) underwent minimally invasive hysterectomy. In the abdominal hysterectomy group, the 75th and 90th percentiles for LOS were 5 and 8days, respectively. All risk factors combined accounted for 23.6% of the variation in LOS >75th percentile. Demographic characteristics explained 4.0%, preoperative factors 7.0%, intraoperative factors 7.9%, and postoperative characteristics 9.7% of variation in prolonged LOS. In the minimally invasive group, the 75th and 90th percentiles for LOS were 1 and 2days, respectively. The combined risk factors explained 16.2% of the variation in prolonged LOS. Demographic characteristics accounted for 6.2%, preoperative factors 4.1%, intraoperative factors 6.9%, and postoperative characteristics 1.3% of variation in prolonged LOS. Similar patterns were seen when prolonged LOS was defined as >90th percentile. ConclusionPerioperative risk factors account for approximately one quarter of the variation in prolonged LOS. Overall, a substantial proportion of the variation in LOS remains unexplained by measurable patient and hospital factors which may limit the utility of LOS as a quality metric for endometrial cancer.
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