Abstracts 81 P9-13: Figure 3a P9-13: Figure 4a P9-13: Figure 3b P9-13: Figure 4b P9-13: Figure 3c P9-13: Figure 4c constant over the years (8.5-9%). PADUA score entry into the audit was initiated in 2016 and was included in 39% of cases recorded in 2016. A clear association was found between annual hospital volume and the proportion of T1 tumours treated with PN rather than RN (see figure 1-2), this association persisted after adjustment for PADUA complexity (figure 3a-b-c). The complication rate decreased with increasing surgical volume, for all patients as well as patients with PN (4a-b-c).