Figure 1
From: A genome-wide tree- and forest-based association analysis of comorbidity of alcoholism and smoking
The pruned tree at the significance level of 0.00001 for ALDX1 using Illumina SNP data. We use circles and boxes to represent internal and terminal nodes, respectively. Under each internal node is the covariate that is used to split the node. Inside each node and from top down are the node number, the numbers of pure unaffected individuals, never drink individuals, unaffected individuals with some symptom, and affected individuals.