Nomogram of Zou et al for Predicting Survival of a Patient with a Spinal Chordoma

Description

Zou et al reported a nomogram for predicting survival for a patient with a spinal chordoma. This can help to identify a patient who may benefit from more aggressive management. The authors are from the University of South China, Central South University, and affiliated hospitals in China as well as the University of Toledo.

Patient selection: spinal chordoma

Parameters:

(1) age in years

(2) Enneking stage

(3) preoperative recurrence

(4) muscle invasion by tumor

(5) type of surgery

(6) immune risk score of Zou et al

Parameter	Finding	Points
age in years	> 50 years	0
	<= 50 years	27.5
Enneking stage	IA	51.1
	IB	56.2
	IIA	0
	IIB	75.6
	III	30.4
preoperative recurrence	yes	0
	no	6.7
muscle invasion	no	0
	yes	26.7
type of surgery	Enneking appropriate	0
	Enneking inappropriate	100
immune risk score	low	0
	high	96

total score =

= SUM(points for all of the parameters)

Interpretation:

• minimum score: 0

• maximum score: 332.5

value of X =

= (-0.00003279 * ((score)^2)) - (0.007346 * (score)) + 1.757

probability of 5-year overall survival =

= 1 / (1 + EXP((-1) * X))

Performance:

• The area under the ROC curve is 0.79.

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