Cytotoxic chemotherapy in advanced non-small cell lung cancer with poor performance status: A retrospective analysis from routine clinical practice

Background: Platinum-based combination chemotherapy is recommended as the standard treatment for patients with advanced non-small-cell lung cancer (NSCLC), but its benefit is limited to patients with performance status (PS) of 0 or 1. However, it is not clear whether these benefits apply to patients with poor performance status (PS 2 and above) and there are no predictors of outcome to suggest whom to treat. The patients with poor performance status (PS 2 and above) accounts for a significant portion (up to 30%) of patients of our practice. In this retrospective analysis, we have analyzed our experience of chemotherapy in patients with poor performance status. Method: A retrospective analysis of patients of advanced NSCLC with poor PS (ECOG PS 2 or more), treated with chemotherapy from October, 2016 to June, 2018 was done. Patients with driver mutations who were treated with first line tyrosine kinase inhibitors were excluded. Hospital case records were reviewed for baseline characteristics, treatment details, and outcome data. Kaplan-Meier curves were drawn to estimate progression free survival. Log-rank test was used to assess factors affecting survival. Data was analyzed using STATA ver 11 (StataCorp. 2009. College Station, TX: StataCorp LP). P value <0.05 was taken as significant. Result: A total of 96 patients were included in the analysis. The median age of the patients was 62 years (range 30-84 years). Majority (67.7%) was males and 65% patients were smokers (current or former). Patients with ECOG PS (Eastern Cooperative Oncology Group Performance Status) of 2 constituted 64.5% of this cohort and 34 patients (33.5%) had an ECOG PS of 3 or 4. The most common chemotherapy regimen used was combination of weekly paclitaxel (60 mg/m(2)) and carboplatin (AUC2) in 57.8%. Most patients (64%) could complete 4 or more cycles of chemotherapy, however, 15 patients (15.7%) could receive only 1 cycle. Grade 3/4 toxicities were observed in 22 (23%) % patients, which were hematological in most cases (anemia and thrombocytopenia). At least one point improvement in ECOG PS from baseline during chemotherapy was observed in 43 patients (45%) after 4 cycles of chemotherapy. Objective response and disease control rates were 20% and 48.42%, respectively. After a median follows-up of 11.2 months, median progression free survival was 6.3 months (95% confidence interval 5-10.63). On univariate analysis, we found that male sex and use of weekly paclitaxel-carboplatin were associated with better progression-free survival PFS. Conclusion: Systemic chemotherapy in modified doses and schedules in advanced NSCLC patients with PS 2 and above is feasible and may be associated with better symptom palliation with clinical benefit and improved survival. (C) 2020 Elsevier Inc. All rights reserved.