CD274 and squamous cell carcinoma: As shown in Table 1, the SEQ group showed a higher male predominance (91.3% vs. 78.2%, p = 0.016), more patients with squamous cell carcinoma (43.5% vs. 26.1%, p = 0.012), and more patients with 1–49% PD-L1 expression (79.7% vs. 57.0%, p = 0.001) than the CIT group.