Abstract
Nodal positivity following neoadjuvant chemotherapy in locally advanced non-small cell lung cancer (NSCLC) is considered a poor prognostic sign, but little data are available on the efficacy of adjuvant chemotherapy in these cases. This analysis sought to determine whether adjuvant chemotherapy was associated with increased survival in NSCLC patients with residual N1 disease at resection. Patients from the National Cancer Database (NCDB) with cN1T1-2M0 NSCLC treated with neoadjuvant chemotherapy and definitive resection between 2006 and 2012 were identified. Treatment groups were defined as those receiving no additional therapy or adjuvant chemotherapy ± radiation after resection. Five-year overall survival (OS) was estimated for each group. Cox proportional hazard regression was used to estimate hazard ratios adjusting for demographic, clinical, and facility characteristics. Among 90 eligible patients, 5-year OS was 43% and 56% for patients receiving adjuvant chemotherapy and no additional treatment, respectively (P < 0.56). With multivariable analysis, the estimated hazard ratio was 0.61 (95% CI: 0.61-2.64, P = 0.51) for adjuvant chemotherapy compared to no additional therapy. This analysis suggests that adjuvant chemotherapy is not associated with increased survival in NSCLC patients with pathologic N1 NSCLC following neoadjuvant chemotherapy and resection.
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