Table 2. Univariate analysis of survival by age, sex, primary site and year of diagnosis.

	Osteosarcoma					Ewing's sarcoma
	N	1 year	5 years	10 years	P	N	1 year	5 years	10 years	P
Age (years)
0–4	9	67	67	56	0.39	27	85	52	48	<0.0001
5–9	99	91	58	55		109	89	59	56
10–14	340	86	45	43		242	91	48	42
15–19	446	85	47	41		216	81	30	26
20–24	206	84	52	45		123	77	38	32
25–29	82	79	48	45		62	82	40	32
30–39	115	90	56	49		52	75	48	34
Sex
Male	759	85	47	41	0.031	485	83	43	37	0.61
Female	538	86	53	49		346	87	42	38
Primary site
Skull	52	94	67	67	<0.0001	25	92	56	56	<0.0001
Spine	21	76	43	29		58	79	43	36
Ribs, sternum	21	67	38	33		88	86	45	38
Pelvis	55	64	24	21		206	77	24	21
Arm	157	86	44	35		102	88	53	47
Hand						11	100	73	64
Leg	964	87	51	47		284	90	49	42
Foot	11	73	64	55		24	88	46	42
Unspecified	16	69	50	44		33	64	39	36
Year of diagnosis
1980–1984	469	79	42	36	<0.0001	279	84	31	26	<0.0001
1985–1989	428	89	54	50		274	84	46	40
1990–1994	400	89	53	48		278	86	51	45

Percentage survival rates at 1, 5 and 10 years after diagnosis and P-value from log rank test for heterogeneity.