Background: Ankle-brachial index (ABI) is a simple method for diagnosing peripheral artery disease (PAD) but has limited reliability in patients with diabetes mellitus (DM) because of medial artery calcification. Our study aims to investigate whether the toe brachial index (TBI) or the cardio-ankle vascular index (CAVI) has a better detection over the ABI for diagnosing PAD in diabetic kidney disease (DKD). Materials and Methods: A cohort of 368 patients (mean age 68.59 ± 13.14 years, 190 males and 178 females) with type 2 DM underwent ABI, TBI, and CAVI measurements at our outpatient clinic. Results: Of all enrolled patients, the TBI is significant in evaluating PAD, especially in patients whose chronic kidney disease (CKD) stage 3a with adjusted odds ratio (AOR) = 6.50, 95% confidence interval (CI) 1.63–25.97, p = 0.0080, stage 3b AOR = 7.47, 95% CI 1.52–36.81, p = 0.0135, and stage 4–5 AOR = 20.13, 95% CI 1.34–94.24, p = 0.0116. CAVI is also significant in CKD stage 1 with AOR = 0.16, 95% CI 0.03–0.77, p = 0.0223, stage 2 with AOR = 0.18, 95% CI 0.04–0.74, p = 0.0180, and stage 3a AOR = 0.31, 95% CI 0.10–0.93, p = 0.0375. Conclusion: TBI has a better yield of detection of PAD compared to ABI among Taiwanese patients with DKD. CAVI may play a role in the early stage of DKD.

Hemodialysis (HD) patients are at higher risk of severe COVID‐19 and may exhibit suboptimal vaccine responses. This study evaluates the factors influencing vaccine‐induced immunity in HD patients following the second dose of the Vaxzevria. A total of 276 HD patients and 126 controls were included. Antibody responses were assessed using binding antibody units (BAU). Operational antibody thresholds used in prior literature were applied to classify antibody levels as evaluated as 50% and 60% vaccine efficacy (VE) levels after the first dose and second dose separately. Linear regression model and stratification by baseline characteristics were performed to identify clinical factors associated with vaccine responses. HD patients had significantly lower median antibody levels compared to healthy subjects. Antibody levels decreased with age, with the oldest tertile having the lowest response. Higher BMI and favorable body composition, such as increased fat tissue index, were positively correlated with stronger immune responses. Patients with elderly, diabetes mellitus, heart failure, and low BMI were associated with reduced antibody responses and lower rates of achieving 50% and 60% VE thresholds. Vaccine‐induced immunity in HD patients is influenced by age, BMI, body composition, and comorbidities. Tailored vaccination strategies, including booster doses, are essential to enhance protection in this vulnerable population.