Impact of Age on Prescribing Patterns of Cardiovascular Medications in Older Japanese Patients with Non-Dialysis-Dependent Chronic Kidney Disease: A Cross-Sectional Study

Aim: Older patients with chronic kidney disease (CKD) are more likely to be excluded from clinical trials. This exclusion affects the quality of cardiovascular disease (CVD) prevention in this population. Methods: Baseline data from the Fukuoka Kidney Disease Registry (FKR) cohort, which included 4476 adult patients with CKD stages G1-G5, were cross-sectionally analyzed to compare the use of recommended drugs for preventing CVD in each age group. Results: Different prescribing patterns were observed according to age for the cardiovascular drug classes. Older patients with CKD were less likely to receive renin-angiotensin system (RAS) inhibitors and were more likely to receive calcium channel blockers. The proportion of anticoagulation prescriptions for patients with CKD and atrial fibrillation decreased in the older age group (>= 75 years). However, the proportion of antiplatelet therapy in patients with ischemic CVD increased linearly with age, even in the very old group aged >= 85 years. These findings suggest a severe cardiovascular burden in patients with CKD. Notably, RAS inhibitor use was avoided in the older group despite a severe cardiovascular burden, such as a high prevalence of CVD history and massive albuminuria >300 mg/g creatinine. This finding indicates that an older age independently contributed to the non-use of RAS inhibitors, even after adjusting for other covariates. Conclusions: This study suggests that age is a potential barrier to the treatment of patients with CKD and highlights the need to establish individualized treatment strategies for cardiovascular protection in this population.