Table 5 Threshold effect analysis in females
From: Gender-specific inflammatory burden and headache risk in youth: a NHANES analysis
Age | < 18y | ≥ 18y | Total |
|---|---|---|---|
Model I | P-interaction: 0.880 | ||
Linear effect | 1.00 (0.99, 1.01) 0.8939 | 1.00 (0.98, 1.01) 0.7952 | 1.00 (0.99, 1.01) 0.8032 |
Model II | P-interaction: 0.853 | ||
Breakpoint (K) | 3.78 | 0.87 | 3.78 |
< K-segment effect 1 | 1.12 (1.01, 1.25) 0.0385 | 1.99 (0.39, 10.23) 0.4096 | 1.11 (1.00, 1.23) 0.0444 |
> K segment effect 2 | 1.00 (0.98, 1.01) 0.4875 | 1.00 (0.98, 1.01) 0.6730 | 1.00 (0.99, 1.01) 0.4092 |
Difference in effect between 2 and 1 | 0.89 (0.79, 0.99) 0.0386 | 0.50 (0.10, 2.58) 0.4083 | 0.90 (0.81, 1.00) 0.0427 |
Predicted value of the equation at the folding point | -0.64 (-0.94, -0.33) | -0.42 (-0.89, 0.04) | -0.60 (-0.86, -0.33) |
log-likelihood ratio test | 0.037 | 0.401 | 0.042 |