Table 4.

Univariate and multivariate analyses of nodal failure for all enrolled LNs.

Risk Factors	Nodal Failure Rate	Univariate Analysis (χ2 Test)	Multivariate Analysis (Logistic Test)
		p Value	HR (95%CI)	p Value
Dpre (cm)
≥1.15 vs. <1.15	12.2% vs. 4.8%	0.016	—	—
Vpre (cm3)
≥2.85 vs. <2.85	14.8% vs. 3.4%	<0.001	—	—
D20F (cm)
≥0.95 vs. <0.95	20.1% vs. 1.8%	<0.001	6.855 (1.402–33.518)	0.017
V20F (cm3)
≥3.45 vs. <3.45	27.2% vs. 4.2%	<0.001	—	—
ΔD20F
<0.245 vs. ≥0.245	24.1% vs. 3.1%	<0.001	—	—
ΔV20F
<0.435 vs. ≥0.435	23.9% vs. 3.1%	<0.001	3.069 (1.027–9.170)	0.045
Histology
Non-SCC vs. SCC	20.0% vs. 8.3%	0.034	—	—
Radiation dose (Gy)
<60 vs. ≥60	18.4% vs. 6.4%	0.001	—	—
Cycles of CT
<4 vs. ≥4	22.8% vs. 5.5%	<0.001	3.635 (1.441–9.166)	0.006
Distribution of LNs
PALNM vs. PLNM	16.4% vs. 7.8%	0.035	—	—