Fig. 1

The classification tree model for hypertension in adults. Data are shown in the percentage (%) and number (n). Continuous variables were divided into categorical variables after the classification tree was grown and pruned based on the restriction of the minimum sample size of the root (100) and child (50) nodes. The figure showed only variables with close associations with hypertension in adults. Abbreviations: n, number; BMI, body mass index; UA, uric acid; TG, triglyceride; TC, total cholesterol