Table 3.
Utilize the two-segment piecewise linear regression model for the analysis of threshold effects between NHHR and nephrolithiasis
| Adjusted | ||
|---|---|---|
| OR (95% CI) | P value | |
| Nephrolithiasis | ||
| Fitting by standard linear model | 1.04 (1.00, 1.08) | 0.037 |
| Fitting by two-piecewise linear model | ||
| <3.17 | 1.15 (1.04, 1.27) | 0.0076 |
| >3.17 | 1.00 (0.95, 1.06) | 0.9566 |
| Log-likelihood ratio | 0.039 | |
| Nephrolithiasis recurrence | ||
| Fitting by standard linear model | 1.09 (1.03, 1.14) | 0.0025 |
| Fitting by two-piecewise linear | ||
| <5.43 | 1.15 (1.06, 1.25) | 0.0009 |
| >5.43 | 0.99 (0.87, 1.13) | 0.8860 |
| Log-likelihood ratio | 0.070 | |
Adjusted for sex, age, race, educational level, marital status, Poverty Income Ratio (PIR), Body Mass Index (BMI), vigorous activity, moderate activity, hypertension, diabetes, alcohol and smoking habits