Figure 1From: Use of tree-based models to identify subgroups and increase power to detect linkage to cardiovascular disease traitsTree for D17S2180, overgrown (a) and pruned to optimal tree (b, shaded). Each split is labeled with split criterion. Each node is labeled with node number and t-value obtained from the regression of squared sib-pair difference of systolic blood pressure on IBD for the subgroup of sib pairs at each node and the number of sib-pairs in the node.Back to article page