A Predictive Model to Determine the Pattern of Nodal Metastasis in Oral Squamous Cell Carcinoma

Table 4

A model developed to predict lymph node metastasis in patients with oral squamous cell carcinoma of buccal mucosa.

	Level 1	Level 2	Level 3	Level 4	Level 5
IP 1 + S 3	√
IP 2 + S 1	√
IP 2 + S 2	√
IP 1 + S 4		√
IP 2 + S 3		√
IP 3 + S 1		√
IP 3 + S 2		√
IP 2 + S 4			√
IP 3 + S 3			√
IP 4 + S 1			√
IP 4 + S 2			√
IP 3 + S 4				√
IP 4 + S 3				√
IP 4 + S 4					√

IP: pattern of invasion; S: stage of the tumour.