Tumour Recurrence, Depth of Invasion, and Temple Location as Independent Prognostic Parameters of Lymph Node Metastases of Head and Neck Cutaneous Squamous Cell Carcinomas

Table 5

Positive predictive values (PPVs) and negative predictive values (NPVs) of cSCC risk factors for nodal metastases.

	PPV (%)	95 (%) CI	NPV (%)	95 (%) CI
Recurrence	75	54%–89	72	68%–77
Depth of invasion ≥4 mm	53	44%–61	80	71%–87
Resection margins Rx + 1 vs. R0	42	32%–53	79	71%–85
Temporal location	70	51%–82	76	66%–85
T stage: T 3 + 4 vs. 1	56	43%–69	81	73%–87