Table 1.
Baseline correlation analysis and best model of determinants of GFR and intrarenal resistive index.
| GFR | Intrarenal RI | |||
|---|---|---|---|---|
| Variable | Correlation Coefficient | Best Model Standard Coefficient |
Correlation Coefficient | Best Model Standard Coefficient |
| Age (years) | −0.313 *** | −0.192 * | 0.175 * | - |
| Male sex (yes/no) | 0.109 | - | 0.099 | - |
| Past or active smoker (yes/no) | 0.068 | - | 0.044 | - |
History of (yes/no):
|
−0.019 0.128 0.049 −0.120 −0.030 −0.064 −0.084 |
- - - - - - - |
0.110 0.071 0.046 0.143 0.064 −0.018 0.133 |
- - - - - - - |
| Body mass index (kg/m2) | −0.054 | - | 0.011 | - |
| Systolic blood pressure (mm Hg) | 0.110 | 0.132 | −0.081 | - |
| Pulse pressure (mm Hg) | 0.080 | - | 0.041 | - |
| Plasma glucose levels (mg/dL) | −0.085 | - | 0.091 | - |
| Total cholesterol (mg/dL) | −0.157 | −0.187 * | −0.244 ** | - |
| Non-HDL cholesterol (mg/dL) | −0.121 | - | −0.270 ** | −0.308 *** |
| Triglycerides (mg/dL) | 0.041 | - | −0.010 | - |
| Statin user (yes/no) | 0.045 | - | 0.254 ** | - |
| Serum creatinine (mg/dL) | −0.545 *** | - | 0.347 *** | - |
| Serum uric acid (mg/dL) | −0.120 | - | 0.098 | - |
| GFR (mL/min/1.73 m2) | - | - | −0.299 *** | −0.383 *** |
| 24-h urinary albumin (mg/day) | −0.002 | - | 0.005 | - |
| 24-h urinary protein (mg/day) | −0.014 | - | 0.014 | - |
| Longitudinal kidney diameter (mm) | 0.331 *** | 0.175 * | 0.051 | - |
| Kidney cortical thickness (mm) | 0.362 *** | 0.233 ** | 0.008 | 0.127 |
| Intrarenal RI | −0.299 *** | −0.311 *** | - | - |
* p < 0.050; ** p < 0.010; *** p < 0.001; RI, resistive index; Tia, transitory ischemic attack; GFR, glomerular filtration rate by creatinine clearance.