A Prospective, Open-label, Single-center, Single-arm Phase II Clinical Study of Cadonilimab (AK104) Combined With Monotherapy Chemotherapy in Patients With Advanced Non-small Cell Lung Cancer With Negative Driver Genes and Failed Immunotherapy

Subjects participated in a study where they received cadonilimab intravenously at 6mg/kg every two weeks, prepared in 100mL of normal saline (0.9% NaCl), with a final concentration range of 0.2-5.0mg/mL. The infusion solution must be used within 4 hours of preparation. Treatment continued until disease progression (PD), unacceptable toxicity, or 24 months, whichever came first. Patients who investigators deemed could still benefit from cadonilimab post-PD were allowed continued treatment. Chemotherapy regimens were selected by investigators based on prior medication use, including gemcitabine, pemetrexed, docetaxel, albumin-bound paclitaxel, or vinorelbine as second- or third-line therapy