No abstract

Objectives: Two phase III trials show that maintenance pemetrexed therapy after platinum-doublet chemotherapy prolongs overall survival (OS) and progression free survival (PFS) in advanced non-squamous non-small-cell lung cancer (NSCLC). However, few patients in the control arms received pemetrexed at progression in these trials, performance status (PS) two patients were ineligible and few of the participants were elderly. Thus, we designed this study comparing immediate switch-maintenance pemetrexed therapy with pemetrexed at progression after platinum-doublet chemotherapy. Methods: Patients with stage IIIB/IV non-squamous NSCLC, !18 years, PS 0-2, and non-progression after four courses of carboplatin/vinorelbine were randomized to receive immediate maintenance pemetrexed therapy or observation followed by pemetrexed at progression. The primary endpoint was OS, secondary endpoints were PFS, toxicity and health related quality of life (HRQoL). Results: 105 patients were randomized between May 2014 and September 2017. Median age was 67 years, 36% were >70 years, 9% had PS 2, 91% stage IV and 47% were women. In the observation arm, 73% received pemetrexed at progression. Patients in the maintenance arm had a numerically longer OS (median 12.0 vs. 10.0 months; p ¼ .10) and a statistically significant longer PFS (median 3.1 vs. 1.9 months; p < .01). In multivariable analyses adjusting for baseline characteristics, there was a trend toward improved OS (HR 0.65, 95% CI 0.42-1.01); p ¼ .05), and a significantly improved PFS (HR 0.53, 95% CI 0.35-0.80; p < .01). There were no significant differences in toxicity or HRQoL between the treatment arms. Conclusion: There was a trend toward prolonged OS and significantly longer PFS from switch-maintenance pemetrexed therapy when 73% of patients in the control arm received pemetrexed at progression.

9007 Background: Concurrent chemoradiotherapy is the standard treatment of LD SCLC. Some patients are cured, but most relapse and better treatment is needed. 45 Gy in 30 fractions BID is the most recommended TRT-schedule. Studies suggest that a higher TRT-dose might prolong survival, but hitherto, this has not been confirmed in randomized trials. We aimed to investigate whether high-dose BID TRT of 60 Gy in 40 fractions was feasible, tolerated, and improved survival. Methods: Patients > 18 years, performance status (PS) 0-2 and confirmed LD SCLC were to receive 4 courses of platinum/etoposide and were randomized to BID TRT of 60 or 45 Gy. Responders were offered prophylactic cranial irradiation of 25-30 Gy. Primary endpoint was 2-year survival; secondary endpoints were toxicity, progression free survival (PFS), and overall survival (OS). To demonstrate a 25% improvement of 2-year survival from 53% to 66% with a one-sided α = .10 and β = .80, 75 patients were required on each arm. Results: Between 2014-2018, 176 patients were enrolled at 22 Scandinavian hospitals. 160 completed TRT per protocol and were eligible for the present analyses (60 Gy: n = 84, 45 Gy: n = 76). Median age was 65, 58% women, 90% PS 0-1. There were no significant differences in grade 3–4 esophagitis (60 Gy: 19%, 45 Gy: 18%, p = .92) or grade 3–4 pneumonitis (60 Gy: 4%, 45 Gy: 0%, p = .10). There was a trend towards more neutropenic infections on the 45 Gy arm (60 Gy: 21%, 45 Gy: 36%, p = .05). There were no significant differences in other grade 3-4 toxicity. Three patients died during the study treatment period (60 Gy: one neutropenic infection and one aortic dissection; 45 Gy: one thrombocytopenic bleeding). There were no statistically significant differences in response rates (60 Gy: 88% [95% CI 81-95], 45 Gy: 85% [95% CI 76-93], p = .52) or median PFS (60 Gy: 20 months [95% CI 11-29], 45 Gy: 14 months [95% CI 10-19], p = .31). Significantly more patients on the 60 Gy arm were alive after 2 years (60 Gy: 73% [95% CI 63-83], 45 Gy: 46% [95% CI 36-60], p = .001), and they had a significantly longer median overall survival (60 Gy: 42 months [95% CI 32-51], 45 Gy: 23 months [95% CI 17-28], HR .63 [95% CI .41-.96], p = .031). Conclusions: LD SCLC patients who received BID TRT of 60 Gy had a statistically significant and numerically substantial benefit in terms of 2-year survival (primary endpoint) and median overall survival compared with those who received BID TRT of 45 Gy. The higher TRT dose did not cause more toxicity than the standard dose. Clinical trial information: NCT02041845.

8519 Background: Up to 1/3 of LS SCLC patients are cured by chemoradiotherapy (CRT), but severe toxicity is frequent and population-based studies show that many patients do not receive standard CRT. More knowledge on how to predict who experiences side-effects or achieves long term disease control is needed. Poor nutritional status is strongly associated with inferior survival in many types of cancer including non-small cell lung cancer, but little is known about whether this is the case in LS SCLC. We investigated whether nutritional status reported by patients on the Patient-Generated Subjective Global Assessment Short Form (PG-SGA SF) was associated with toxicity and survival among participants in a trial comparing high dose with standard dose twice-daily TRT in LS-SCLC (NCT02041845, n=170). Methods: Patients received four courses of platinum/etoposide chemotherapy and were randomized to TRT of 60 Gy/40 fractions or 45 Gy/30 fractions. Patients completed PG-SGA SF before treatment commenced and were categorized as having low (PG-SGA SF score 0–3.9), intermediate (4.0–8.9) and high (≥9) risk of malnutrition. Toxicity was graded according to CTCAE 4.0. Median follow-up for survival was 49 months. Results: 113/170 (66.5%) patients completed PG-SGA SF at baseline. Median age was 65 years, 46.0% were men, 88.5% had PS 0-1, 87.6% stage III disease and 22.1% weight loss of >5% the three months before inclusion. Median PG-SGA SF score was 3.0, 52.2% of patients had low, 29.2% intermediate, and 18.6% high risk of malnutrition. Numerically, there were more patients with stage III, PS 1-2 and pleural fluid among those at high risk. There was no difference in mean no. of chemotherapy courses (low: 3.85, intermediate: 3.88, high: 3.90, p=0.95) or TRT completion (low: 96.6%, intermediate: 97.0%, high: 95.2%, p=1.0). There were no statistically significant differences in proportions who experienced grade 3-4 toxicity (low: 88%, intermediate: 91%, high: 86%, p=0.86), median PFS (low: 15.1 months, intermediate: 11.8 months, high: NR, p=0.23), 2-year survival (low: 68%, intermediate: 52%, high: 67%, p=0.28) or median OS (low: 38.1 months, intermediate: 25.8 months, high: NR, p=0.15). Patients with weight loss >5% did not experience more grade 3-4 toxicity (92% vs. 87%, p=0.73), had similar median PFS (24.0 vs. 15.9 months, p=0.69), 2-year survival (64.0% vs. 66.2%, p=0.84) and median OS (30.6 vs. 35.1 months, p=0.93) as those without. Conclusions: Our study suggest that LS SCLC patients tolerate and should receive concurrent chemotherapy and twice-daily TRT regardless of nutritional status and weight loss.

Background: The Glasgow prognostic score (GPS) is an established inflammatory prognostic index in cancer patients. Most studies have only measured GPS at baseline (B-GPS). Effective cancer therapy may reduce inflammation, and we investigated whether re-assessing GPS after first-line chemotherapy (E-GPS) provided more prognostic information than B-GPS in a phase III trial of advanced non-squamous non-small cell lung cancer (NSCLC). Methods: Glasgow prognostic score was assessed before and after carboplatin/vinorelbine chemotherapy. When assessing GPS, C-reactive protein (CRP) ⩾ 10 mg/L and albumin < 35 mg/L are defined as abnormal values. GPS 0: both values normal, GPS 1: one abnormal value, and GPS 2: both values abnormal. Results: Glasgow prognostic score at baseline and E-GPS were available in 138 patients. Median age was 67 years, 51% were women, and 94% had performance status 0-1. B-GPS was not a statistically significant prognostic factor (B-GPS 1 vs 0: hazard ratio [HR] = 1.32, 95% confidence interval [CI] = 0.9-2.0; B-GPS 2 vs 0: HR = 1.46, 95% CI = 0.9-2.3), while E-GPS was (E-GPS 1 vs 0: HR = 1.57, 95% CI = 1.0-2.4; E-GPS 2 vs 0: HR = 2.77, 95% CI = 1.7-4.5). E-GPS was associated with treatment response ( P < .01), whereas B-GPS was not. Conclusion: Glasgow prognostic score at baseline after first-line chemotherapy provided more prognostic information than baseline GPS in patients with advanced non-squamous NSCLC and was associated with treatment response. ClinicalTrials.gov Identifier: NCT02004184.

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Patient-reported health-related quality of life from a randomized phase II trial comparing standarddose with high-dose twice daily thoracic radiotherapy in limited stage small-cell lung cancer, Lung Cancer (2022), doi:

1783OPatient reported outcomes from a randomized phase II trial comparing standard-dose with high-dose twice daily (BID) thoracic radiotherapy (TRT) in limited stage small cell lung cancer (LS SCLC