Table 2.

Heterogeneity of the risk factor nevi in risk prediction models for melanoma regarding four aspects: minimum size of nevi to be counted, body area of nevi count, type of nevi assessment, and measurement level (n = 35 models).

Risk Factors	n	%
Size of nevi
≥2 mm	7	20.0
≥5 mm	2	5.7
>3 mm	1	2.9
≥2 mm and ≥5 mm, respectively	1	2.9
Not reported	24	68.6
Site of nevi count (1)
Entire body	17	48.5
Both arms	6	17.1
Right arm	2	5.7
Forearm and back	2	5.7
Back	2	5.7
Left arm	1	2.9
Not reported	6	17.1
Assessment
Physician/nurse/trained examiner	15	42.9
Self-reported	13	37.1
Not reported	7	20.0
Measurement level
Categorical	31	88.6
Metric	2	5.7
Dichotomous	1	2.9
Not reported	1	2.9

⁽¹⁾ One model with nevi counted on two different sites.