Characteristics and Patterns of Metastatic Disease from Chordoma

Table 5

Survival distribution stratified by primary tumor location.

(a) Case processing summary of patients included in analysis

Primary tumor; location	Total	of events	Censored
				Percent
Cervical	1	1	0	0%
Lumbar	4	4	0	0%
Sacral	16	12	4	25%
Thoracic	3	3	0	0%
Overall	24	20	4	16.7%

(b) Overall statistical comparison and test of equality of survival distributions

	Chi-Square	df	Sig.
Log rank (Mantel-Cox)	7.917	3	0.048

(c) Means and medians for survival time. Estimation is limited to the largest survival time if it is censored

Primary tumor location	Mean					Median
			95% Conf. interval					95% Conf. interval
	Estimate	Std. error	Lower bound	Upper bound		Estimate	Std. error	Lower bound	Upper bound
Cervical	20.4	N/A	20.4	20.4		20.4	N/A	N/A	N/A
Lumbar	106	13.1	80.1	131.8		104.9	24.1	57.6	152.2
Sacral	127.9	20.7	87.4	168.4		130.4	3.8	123	137.9
Thoracic	82.6	31.8	20.4	144.9		70.1	28.7	13.9	126.3
Overall	111.7	14.6	83	140.5		128	18.4	92	164