Table 7. Results of Cox proportional hazards analysis for Ewing's sarcoma diagnosed during 1985–1994.

	HR (95%CI)
	(i) All primary sites	(ii) Limb primaries only
Sex
Male	1 (reference)	1 (reference)
Female	0.94 (0.75, 1.18)	0.89 (0.63, 1.27)
Age (years)
0–9	1 (reference)	1 (reference)
10–14	1.61 (1.04, 2.50)	2.05 (1.06, 3.97)
15–19	2.04 (1.27, 3.28)	3.08 (1.50, 6.31)
20–24	2.09 (1.21, 3.61)	3.18 (1.42, 7.10)
25–39	1.63 (0.94, 2.82)	1.95 (0.82, 4.61)
Primary site
Skull	0.46 (0.19, 1.13)	—
Spine, ribs, sternum	1.20 (0.87, 1.66)	—
Pelvis	1.64 (1.24, 2.18)	—
Upper limb	0.87 (0.59, 1.28)	0.89 (0.61, 1.31)
Lower limb	1 (reference)	1 (reference)
Unspecified	1.18 (0.69, 2.00)	—
Main treatment centre
BTS	0.44 (0.27, 0.71)	0.54 (0.24, 1.20)
UKCCSG	0.50 (0.30, 0.84)	0.57 (0.24, 1.32)
Teaching	0.64 (0.43, 0.97)	0.58 (0.29, 1.15)
Non-teaching	1 (reference)	1 (reference)
Unknown	0.42 (0.22, 0.80)	0.84 (0.29, 2.48)
Surgical centre
BTS	—	1 (reference)
Other	—	1.32 (0.82, 2.12)
Trial status
Trial	1 (reference)	1 (reference)
Nontrial	1.28 (0.97, 1.68)	1.31 (0.87, 1.97)