Table 3.
Threshold effect analysis
| PHR | HYPERTENSION | SBP | DBP |
|---|---|---|---|
| Model 1 | |||
| A straight-line effect |
1.13 (1.09, 1.17) < 0.001 |
0.32 (0.09, 0.54) 0.0056 |
0.50 (0.33, 0.67) < 0.001 |
| Model 2 | |||
| Fold points (K) | 2.8 | 1.29 | 3.41 |
| < K-segment effect 1 |
1.19 (1.13, 1.26) < 0.001 |
-2.64 (-4.08, -1.21) 0.0003 |
0.81 (0.60, 1.02) < 0.001 |
| > K-segment effect 2 |
1.03 (0.95, 1.12) 0.466 |
0.54 (0.29, 0.79) < 0.001 |
-0.68 (-1.16, -0.20) 0.006 |
| Effect size difference of 2 versus 1 |
0.87 (0.78, 0.97) 0.011 |
3.19 (1.66, 4.71) < 0.001 |
-1.49 (-2.06, -0.92) < 0.001 |
| Equation predicted values at break points | -0.52 (-0.57, -0.47) | 122.02 (121.72, 122.32) | 72.45 (72.13, 72.78) |
| Log likelihood ratio tests | 0.01 | < 0.001 | < 0.001 |