Impact of surgical wait times during summer months on the oncological outcomes following robotic-assisted radical prostatectomy: 10 years' experience from a large Canadian academic center.

Purpose: Most Canadian hospitals face significant reductions in operating room access during the summer. We sought to assess the impact of longer wait times on the oncological outcomes of localized prostate cancer patients following robotic-assisted radical prostatectomy (RARP).

Methods: We conducted a retrospective review of a prospectively maintained RARP database in two high-volume academic centers, between 2010 and 2019. Assessed outcomes included the difference between post-biopsy UCSF-CAPRA and post-surgical CAPRA-S scores, Gleason score upgrade and biochemical recurrence rates (BCR). Multivariable regression analyses (MVA) were used to evaluate the effect of wait times.

Results: A total of 1057 men were included for analysis. Consistent over a 10 year period, summer months had the lowest surgical volumes despite above average booking volumes. The lowest surgical volume occurred during the month of July (7.1 cases on average), which was 35% less than the cohort average. The longest average wait times occurred for patients booked in June (93 ± 69 days, p < 0.001). On MVA, patients booked in June had significantly more chance of having an increase in CAPRA score [HR (95% CI) 1.64 (1.02-2.63); p = 0.04] and in CAPRA risk group [HR (95% CI) 1.82 (1.04-3.19); p = 0.03]. Cohort analysis showed fair correlation between CAPRA-score difference and wait time (Pearson correlation: r =  - 0.062; p = 0.044).

Conclusion: Our cohort results demonstrate that conventional RARP wait times are significantly and consistently prolonged during summer months over the past 10 years, with worse post-RARP oncological outcomes in terms of CAPRA scores. Other compensatory mechanisms to sustain consistent yearly operative output should be considered.