TABLE 3.

Hazard ratios for the seven variables in the nomogram

Predictor	Hazard ratio	95 % CI	p value
Age*	1.71	(1.07, 2.74)	0.025
Postop calcitonin**	1.54	(0.63, 3.73)	0.34
Sex—female:male	0.6	(0.33, 1.11)	0.1
PVI—yes:no	2.41	(1.14, 5.08)	0.021
pN stage
pNO/NX	Reference
pN1a	0.93	(0.25, 3.51)	0.14
pN1b	2.2	(0.90, 5.38)
pT stage
pT1	Reference
pT2	1.62	(0.46, 5.71)	0.18
pT3	2.35	(0.95, 5.84)
pT4	3.04	(1.11, 8.33)
M status	2.16	(0.93, 4.99)	0.072

^*Hazard ratio for age as a continuous variable is based upon the contrast of the 3rd quartile vs the 1st quartile (64 vs 40)

^**Hazard ratio for postopcalcitonin as a continuous variable is based upon the contrast of the 3rd quartile vs the 1st quartile (320 vs 0)