Abstract:Objective To analyze the risk factors of myelosuppression in patients with initially diagnosed non-small cell lung cancer(NSCLC) undergoing initial chemotherapy. Methods One hundred and sixty five patients with initially diagnosed NSCLC were prospectively enrolled in the study. All patients received chemotherapy of gemcitabine/cisplatin(GP) regimen. The hemoglobin, white blood cells, neutrophil and platelets were weekly followed-up until the completion of chemotherapy cycles. The risk factors of myelosuppression after initial chemotherapy were analyzed. Results There were 63 cases having no myelosuppression and 102 cases with myelosuppression. There were significant differences in age, surgery, TNM stage, comorbidities, as well as the hemoglobin, leukocytes, neutrophil and platelets levels before chemotherapy between two groups(P<0.05). Logistic regression analysis showed that age, TNM stage, comorbidities and hemoglobin before chemotherapy were risk factors of myelosuppression(P<0.05). Conclusion Age, TNM stage, comorbidities and hemoglobin before chemotherapy are independent risk factors of myelosuppression after initial chemotherapy in patients with initially diagnosed Non-small cell lung cancer.