P2.17-02 Survival in Performance Status 3 Non-Small Cell Lung Cancer Patients Receiving Radical Radiotherapy

International guidelines currently recommend radical radiotherapy for non-small cell lung cancer (NSCLC) patients with ECOG performance status (PS)0-2. Despite a paucity of evidence for treating poorer PS patients, modern advances have allowed patients with PS3 to be offered radical radiotherapy. PS0-3 NSCLC patients receiving radical radiotherapy at The Christie Hospital, UK between August 2016-October 2017 were retrospectively identified from hospital electronic patient records. Survival was calculated from date of first oncology review to November 2018. Baseline and treatment characteristics for PS3 patients were recorded including adult comorbidity evaluation (ACE)-27 score, pulmonary function, radiation dose volume parameters and radiotherapy regimen (i.e stereotactic ablative radiotherapy (SABR) vs standard radiotherapy (50-55Gy/20 fractions)). 504 patients were identified: 440(87%) PS0-2 and 64(13%) PS3. Six PS3 patients withdrew themselves; four before treatment and two after one fraction. Of 58/64(91%) PS3 patients completing radiotherapy, 43(74%), 4(7%), 10(17%) and 1(2%) were Stage I, II, III and IV at diagnosis, respectively. ACE-27 score was 0, 1, 2 and 3 in 3(5%), 8(14%), 16(28%) and 31(53%) patients, respectively. 31(53%) received SABR and 27(47%) standard radiotherapy. On intention-to-treat analysis, there was no significant difference in survival over 18 months in PS3 patients compared to PS0-2; p=0.858 (Fig.1). There was no significant difference in survival among PS3 patients completing radiotherapy when stratifying by stage (I vs II vs III) (p=0.343), ACE-27 score (1 vs 2 vs 3)(p=0.266), or radiotherapy regimen(p=0.655). Lung function tests (FEV1, FVC) and radiotherapy dose volume parameters (PTV, V5, V10,V20) failed to predict survival of PS3 patients at 6, 12 and 18 months. This study demonstrates that PS3 patients receiving radical radiotherapy had a similar 18-month survival compared to PS0-2 patients and baseline and treatment characteristics did not predict overall survival in PS3 patients. This suggests more PS3 patients could be considered for radical radiotherapy and further studies with larger cohorts are recommended.