Table 4 Estimated mean DBP (mm Hg) within each node produced from binary partitions from metals concentrations, adjusted for age, age2, race, sex, BMI, and smoking status; partitions can be linked to the DBP tree via lower case roman numerals (i-vii), and child nodes are classified as left (L) or right (R) for each partition
Partition | Node | End Node | Splits | N | Mean DBP |
|---|---|---|---|---|---|
NA | Root | No | NA | 2413 | 73.06 |
i | L | No | W ≤ 0.1 | 1669 | 72.85 |
R | No | W > 0.1 | 744 | 73.48 | |
ii | L | Yes | Cs ≤ 2.74 | 328 | 73.89 |
R | No | Cs > 2.74 | 1341 | 72.59 | |
iii | L | No | Sb ≤ 0.17 | 501 | 72.83 |
R | Yes | Sb > 0.17 | 243 | 74.65 | |
iv | L | No | W ≤ 0.07 | 1008 | 72.43 |
R | Yes | W > 0.07 | 333 | 73.00 | |
v | L | Yes | Pb ≤ 1.35 | 249 | 70.49 |
R | Yes | Pb > 1.35 | 252 | 75.21 | |
vi | L | No | Mo ≤ 39.46 | 604 | 72.96 |
R | Yes | Mo > 39.46 | 404 | 71.66 | |
vii | L | Yes | Pb ≤ 1.85 | 356 | 71.91 |
R | Yes | Pb > 1.85 | 248 | 74.25 |