Table 2. Risk factors for the growth of iris nevus into melanoma.

Initial	Feature	Hazard ratio	% of patients with tumor growth having this feature	% of patients with no tumor growth having this feature
A	Age ≤40 years	3	48	24
B	Blood	9	11	<1
C	Clock hour-inferior	9	96	71
D	Diffuse configuration	14	4	<1
E	Ectropion uveae	4	48	18
F	Feathery margin	3	52	24

Adapted from Shields et al.³⁰