Efficacy and Safety of Sintilimab Combined with Platinum-containing Double-agent Chemotherapy in First-line Treatment of Locally Advanced or Metastatic Non-small Cell Lung Cancer in Elderly Patients

"1. Sintilimab, 200mg, intravenous infusion on day 1 of each cycle, every 3 weeks as a cycle (Q3W), until disease progression, death, intolerable toxicity, withdrawal of informed consent, initiation of new anti-tumor therapy, or termination of treatment for other reasons specified in the protocol; The longest treatment time of sintilimab was 24 months.~2. Chemotherapy regimen:~1\) Pemetrexed combined with platinum regimen (non-squamous cell carcinoma) : pemetrexed 500mg/m2, intravenous infusion on day 1 of each cycle, cisplatin 75mg/m2 or carboplatin AUC 5, intravenous infusion on day 1 of each cycle, every 3 weeks (Q3W) for a total of 4-6 cycles.~2\) Gemcitabine plus platinum regimen (squamous cell carcinoma) : gemcitabine 1000mg/m2 intravenously on days 1 and 8 of each cycle, cisplatin 75mg/m2 or carboplatin: AUC 5, intravenous infusion on day 1 of each cycle, every 3 weeks (Q3W) for 4-6 cycles."