Table 3.

Prognostic factors, multivariate analysis (n = 490)

	High grade=III-IV		High grade=IV
	RR	95% CI	RR	95% CI
Large size	2.4	1.5–3.7	2.6	1.7–4.0
Deep location	1.3	0.86–1.8	1.4	0.96–2.0
High grade	2.5	1.6–3.7	15	4.8–47