Table 3 Nonlinearity explaination on HbA1c and coronary artery calcium score progression using two-piecewise linear model
Effect size (95%CI) P value | |
|---|---|
Fitting model by standard linear regression | 1.22 (1.18, 1.26) < 0.0001 |
Fitting model using two-piecewise linear model | |
Inflection point | 5.8 |
< 5.8 | 2.06 (1.85, 2.29) < 0.0001 |
> 5.8 | 1.04 (0.99, 1.10) 0.1179 |
P for log-likelihood ratio test | < 0.001 |