Table 5.

Multivariate Cox proportional hazards analysis.

Covariate	Regression coefficient, β (SE)	Wald statistic	p	Hazard coefficient, Exp(b) (95% CI)
Patient age at diagnosis, years	0.002 (0.007)	0.1	0.746	1.0 (1.0–1.0)
Tumor diameter, mm	0.1 (0.1)	7.6	0.006	1.1 (1.0–1.3)
Tumor thickness, mm	0.1 (0.06)	2.2	0.134	1.0 (1.0–1.2)
AJCC stage 1–4	− 0.03 (0.3)	0.02	0.895	1.0 (0.6–1.6)
Distance to optic disc, mm	− 0.0004 (0.03)	0.0003	0.985	1.0 (0.9–1.1)
Local recurrence, yes/no	0.5 (0.2)	5.9	0.015	1.1 (1.1–2.4)