Fig. 4

The correlation between moderate CKD and HI grades of low- and high-frequency PTA. (A)low-frequency PTA. (B)high-frequency PTA. OR, odds ratio; CI, confidence intervals; Model 1: no covariates were adjusted; Model 2: age, gender, and race were adjusted; Model 3: age, gender, race, educational level, PIR, BMI, smoke, hypertension, diabetes, and CHD were adjusted. Statistical significance was determined using ordered logistic regression models, with p-values ≤ 0.05 considered statistically significant. Results are expressed as odds ratios with 95% confidence intervals (CI).