Table 3.

Univariate analysis for regional control, distant control, DFS, DSS and OS

Variable	Regional Control	Distant Control	DFS	DSS	OS
Lymph Node Yield
	P = 0.0004	P = 0.012	P = 0.003	P = 0.003	P = 0.01
Per node examined	RR = 0.95	RR = 0.97	RR = 0.97	RR = 0.97	RR = 0.98
	CI, 0.94–0.99	CI, 0.94–0.99	CI, 0.94–0.99	CI, 0.94–0.99	CI, 0.97–1.0
Neck Dissection
		P = 0.009	P = 0.07	P = 0.02
SND vs. MRND		RR = 3.8	RR = 2.1	RR = 3.05
		CI, 1.3–15.7	CI, 0.94–5.56	CI, 1.21–10.25

SND = Selective neck dissection; MRND = Modified radical neck dissection