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above or below median site volume in the system.Multivariate regression was used identify predictive factors, and analysis of variance (ANOVA) was used to assess variation across different sites and surgeons.RESULTS: We identified 368 cases performed by 8 surgeons across 6 sites (3 HV sites, 3 LV sites). Median site volume was 100 cases. Most cases (304, 75.2%) were performed at HV sites. Mean case DIC, case length, and number DI's used varied significantly across sites (ANOVA p [ 0.000 for all three variables). Overall mean DIC was $975 ($388.8 e $1863), mean number of DI's used was 5.48 (3-9), and mean total case length was 78.7 minutes (28 e 187.8). On multivariate regression, only surgical site was a significant predictor of DIC (p [ 0.000), when adjusting for surgeon and high/low volume status (Figure 1). Site and surgeon were both significant predictors of number of DI's used (p[0.000), and case length (p [ <0.01).CONCLUSIONS: Procedural costs related to URS may vary between hospitals even when performed by the same surgeon. Further investigation into hospital practices with low DIC's is warranted in an effort to potentially identify opportunities for cost savings.

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