Figure 5. Survival analysis of key target genes of Baiying Qinghou decoction using a TCGA dataset. The optimal cutoff value of each gene was calculated to stratify all patients into high- and low-expression groups (the left of the A–G). Seven genes (ADH1C, EGFR, GSTM1, GSTP1, IL1B, NOS3 and TP53) were significantly associated with the prognosis of HNSCC patients (the right of the A–G). The high expression level of ADH1C (A) had a better prognosis of HNSCC patients (P = 0.012). However, the high expression levels of EGFR (B), GSTM1 (C), GSTP1 (D), IL1B (E), NOS3 (F) and TP53 (G) showed the poor prognosis of HNSCC patients. Abbreviations: HNSCC: head and neck squamous cell carcinoma; TCGA: The Cancer Genome Atlas.