Table 1. Observed and expected numbers of angiosarcomas on the trunk and SIR by follow-up time and treatment for the first primary cancer 1953–2003.

	Entire follow-up		Follow-up of 10 or more years
Treatment	O/E	SIR (95% CI)	O/E	SIR (95% CI)
Chemotherapy	0/0.07	0.0 (0–53)	0/0.02	0.0 (0–180)
Radiotherapy	9/1.5	6.0 (2.7–11)	3/0.74	4.1 (0.84–12)
Both	2/0.02	100 (12–360)	1/0.01	100 (2.5–560)
Neither	8/2.2	3.6 (1.6–7.1)	4/0.61	6.6 (1.8–17)
Total	19/3.8	5.0 (3.0–7.8)	8/1.4	5.8 (2.5–11)

CI=confidence interval; E=expected; O=observed; SIR=standardised incidence ratios.