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OA05 - Treatment Advances in SCLC (ID 373)
- Event: WCLC 2016
- Type: Oral Session
- Track: SCLC/Neuroendocrine Tumors
- Presentations: 1
OA05.06 - Compliance and Outcome of Elderly Patients Treated in the Concurrent Once-Daily versus Twice-Daily RadioTherapy (CONVERT) Trial (ID 4061)
14:20 - 15:50 | Author(s): M. Christodoulou
A significant proportion of limited-stage small cell lung cancer are elderly. However, there is paucity of data on the efficacy and safety of concurrent chemo-radiotherapy in the elderly to guide treatment decision-making.
Data from the CONVERT trial was retrospectively analysed to compare the outcome of patients 70 years or older to patients younger than 70 years. Patients were randomised 1:1 to receive 45Gy in 30 twice-daily fractions over 3 weeks or 66Gy in 33 once-daily fractions over 6.5 weeks starting on day 22 of cycle 1 chemotherapy (4 to 6 cycles of Cisplatin 25mg/m2 days 1-3 or 75mg/m2 day 1 with Etoposide 100mg/m2 days 1-3), followed by Prophylactic Cranial Irradiation if indicated. Radiotherapy planning was with a 3D conformal technique or intensity modulated radiotherapy.
Of 547 patients randomised between April 2008 and November 2013, 57 patients were excluded for the purposes of this analysis as they did not receive concurrent chemo-radiotherapy. Of the 490 included patients, 67 (13.7%) were age 70 years or older with median age of 73 years (70-82). Patients’ characteristics were well balanced apart from more male in the elderly group (p=0.02). There was no significant difference in the number of chemotherapy cycles administered in the two groups (p=0.24). A higher proportion of patients received 30 or 33 fractions of radiotherapy as per protocol in the younger group (85% vs. 73%; p=0.03). Neutropenia grade 3/4 occurred more frequently in the elderly group (84% vs. 70%; p=0.02) but there was no statistically significant difference in neutropenic sepsis (4% vs. 7%; p=0.07) and non-haematological acute/late toxicities. There were two vs. six treatment-related deaths in the elderly and younger group respectively (p=0.67). At median follow up of 46 months for those alive; two-year survival was 53% (95% CI 41-64) vs. 57% (95% CI 52-61), median survival was 29 months vs. 30 months in the elderly vs. younger group respectively. Hazard ratios for overall survival and progression free survival were 1.15 (95% CI 0.84-1.59; log-rank p=0.38) and 1.04 (95% CI 0.76-1.41; log-rank p=0.81) respectively. In the elderly group median survival was not significantly different in patients who received once vs. twice daily radiotherapy (p=0.91).
Radiotherapy treatment delivery was higher in the younger group but toxicity and survival rates were similar in elderly compared to younger patients. Concurrent chemo-radiotherapy with modern radiotherapy techniques is a treatment option for elderly patients with good performance status.
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