The APEC study is a multi-center, retrospective ,real-world study of anlotinib combined with PD-1 inhibitors for patients with histologically confirmed advanced and metastatic esophageal squamous cell carcinoma (ESCC) that progressed after 1or more lines of therapy, conducted at 8 sites in China. Patients received anlotinib combined with PD-1 inhibitors , every 3 weeks for up to 2 years, until progression of disease, unacceptable toxic effects occurred, or withdrawal of consent. The primary end point was the progression-free survival (PFS)among all patients. Secondary end points included Adverse events (AEs),objective response rate (ORR) ,duration of response (DOR), , and overall survival (OS). Tumor response was assessed per the Response Evaluation Criteria in Solid Tumors (RECIST), version 1.1.
Efficacy and Safety of Anlotinib combined with PD-1 inhibitors as 2 or more lines treatment for Heavily Pretreated Patients With Advanced, Metastatic Squamous Cell Carcinoma of the Esophagus.