Variables Univariate * Multivariate **   P              OR                  95% CI P              OR                  95% CI Age at diagnosis 0   7.226-18.004 0 1.036 1.017-1.055 Breslow 0.021   0.169-2.025 0.049 1.288 1.013-1.683 MM in situ 0.018 1.662 1.111-2.485 0.015 2.645 1.211-5.778 *Only significant variables in the multivariate logistic regression model are included in the table. **Forward stepwise multivariate logistic regression.

Table 4: Multivariate analysis for characteristics associated with familial melanoma.