P17 The SUMMIT study: results processing time

Introduction The SUMMIT Study aims to assess the implementation of Low-Dose Computed Tomography (LDCT) for lung cancer screening in a high-risk population and to validate a multi-cancer early detection blood test. LDCT results are communicated to participants and their GPs by standardised letter. We aim to evaluate the turnaround time from the scan report to the subsequent management and communication of results via letter. Methods Results are automatically sent to participants and GPs according to pre-defined management plans based on findings collected via proformatised radiology report. Possible outcomes from these reports are: urgent referrals for suspicious findings, nodule surveillance LDCT at 3 months, 12 month surveillance LDCT, or suitable for randomisation at Year 1 to annual or biennial LDCT (see figure 1). Participants with suspicious findings are reviewed by the study clinicians. Where appropriate an urgent referral to the participant’s local hospital is completed manually after discussion with the participant; the automated letters in these cases are delayed until contact is made with the participant and a clinical plan confirmed. Results We report outcomes from the first 11,551 SUMMIT Study participants with completed baseline LDCT reports. We aim to action results within 5 days: 11,319 (98.0%) of all results letters were mailed to participants and 11,423 (98.9%) to their GPs within 5 days. 645 (5.6%) participants required further review and consideration of an urgent referral. For these, 84.6% of results letters were mailed within 5 days, and 95.5% within 12 days. As expected, increased mailing times were observed in cases that were more complex, requiring liaison with an external clinical team or review of imaging at our internal weekly radiology meeting. Discussion Timely reporting of results is crucial in establishing wider roll-out of lung cancer screening in the UK. The vast majority of results are automated and are reliably sent as programmed. A minority require further clinical input and image review, prior to completion of an onwards referral. We demonstrate a scalable and feasible approach to feeding back results following LDCT.