Conventional treatment integrated with Chinese herbal medicine improves the survival rate of patients with advanced non-small cell lung cancer

Objectives: The main objective of this study was to assess whether treatment with epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) combined with Chinese herbal medicine (CHM), can improve the five-year survival rate in patients suffering from advanced non-small cell lung cancer (NSCLC), compared to patients treated by EGFR-TKIs alone.

Interventions and main outcome measures: The study is based on information in the sub-dataset of the National Health Insurance Research Database (NHIRD) from years 2000 to 2010, during which time a total of 14,244 patients were diagnosed with NSCLC in Taiwan. After selection by exclusion criteria and matching process, 2,616 NSCLC patients were included in the study. Statistical analysis was utilized to evaluate the differences in characteristic distribution, and to compare the survival rates between the CHM cohort and non-CHM cohort.

Results: Patients with advanced NSCLC using CHM as an adjunct therapy exhibited a significantly improved survival rate [hazard ration (HR) = 0.8; 95% confidence interval (CI): 0.73-0.87, p value<0.001], compared with non-CHM users. Based on a survival analysis by Kaplan-Meier method, the 5-year survival rate of CHM users was 4.9% higher, with the most notable difference being an elevated 2-year survival rate of up to 12.75%. In addition to the survival rate analysis, we provide the ten most used single herbs and herbal formulas prescribed for patients with advanced NSCLC.

Conclusions: This nationwide retrospective cohort study provides evidence supporting CHM as an effective adjunctive therapy to ameliorate the side effects of target therapy and prolong the five-year survival rate of patients with advanced NSCLC.