Table 6.

Univariate analysis of overall and event-free survival.

Survival	Number of patients	Percent	Event-free survival			Overall survival
Variable			5 year (%)	SE (%)	P (log-rank)	5 year (%)	SE (%)	P (log-rank)
Total	23
Age
<32 years (median)	12	52	64	15	0.438	61	15	0.828
>32 years	11	48	39	21		67	20
Sex
Male	13	57	44	18	0.791	39	17.5	0.235
Female	10	43	63	18		89	10.5
Tumor site
Tarsus	16	70	49	16	0.903	57	15	0.503
Other	7	30	71	17		80	18
Tumor size
<31.5 cm3 (median)	5	50	80	18	0.786	80	18	0.366
>31.5 cm3	5	50	67	27		67	27
Primary metastases
No	20	87	66	13	0.005	78	11	0.008
Yes	3	13	0	0		0	0
AP
Normal	15	75	60	16	0.216	57	16	0.568
Elevated	5	25	30	24		53	25
LDH
Normal	16	84	68	14	0.076	62	15	0.291
Elevated	3	16	0	0		33	27
Duration of symptoms
<154 days (median)	11	55	76	16	0.188	76	16	0.463
>154 days	9	45	29	22		51	20
Delay of chemotherapy
<21 days	8	35	58	19	0.532	73	17	0.441
>21 days	15	65	52	17		57	17
Timing of operation
After preoperative chemotherapy	18	78	52	14	0.929	64	13	0.587
Primary surgery	5	22	67	27		67	27
Type of surgery
Resection	4	17	75	22	0.660	75	22	0.347
Amputation	19	83	45	15		60	14
Surgical remission
Complete remission	21	95	60	13	0.000	72	12	0.000
Macroscopic residual	2	9	0	0		0	0
Tumor response
Good	4	24	38	29	0.980	67	27	0.435
Poor	13	76	64	15		59	16

5-year event-free and overall survival and P values in the log-rank test for all variables (see Data collection and Definition of Variables). SE = standard error; P = two-sided P values.