Background: Chronic kidney disease (CKD) is common in older adults and is often associated with type 2 diabetes (T2DM) and heart failure (HF). However, little is known about the burden of newly diagnosed CKD in Medicare Fee-for-Service (FFS) beneficiaries, including those with comorbid T2DM or HF.
Objective: To quantify the clinical and economic burden of CKD in Medicare FFS beneficiaries, including those with comorbid T2DM or HF.
Methods: In this retrospective cohort study using 100% Medicare FFS claims data (Parts A, B, D) from 2014 to 2022, beneficiaries with incident CKD (based on a diagnosis code on 2 distinct dates) from January 1, 2015, to December 31, 2021, were included; index date was the date of earliest CKD diagnosis. Beneficiaries with a diagnosis of CKD, acute kidney injury, dialysis, kidney transplantation, or a claim for any condition other than T2DM that could cause kidney disease during a 365-day baseline period prior to index date were excluded. Beneficiaries with CKD were categorized into 4 mutually exclusive cohorts: CKD-only; CKD+HF; CKD+T2DM; and CKD+HF+T2DM based on claims during the baseline period. Clinical burden was measured as prevalence at baseline and incidence of key clinical outcomes at 12 months of follow-up. Economic burden was measured as all-cause and CKD-related health care resource utilization (HCRU) and inflation-adjusted costs in the baseline period and at 12 months of follow-up.
Results: The overall cohort consisted of 2,260,075 patients, mean (SD) age 78.3 (7.7) years (56.5% CKD-only; 7.2% CKD+HF; 30.9% CKD+T2DM; and 5.4% CKD+HF+T2DM). The CKD+HF+T2DM cohort generally exhibited the highest incidence of clinical outcomes within 12 months. Cohorts with HF had higher HCRU across all claim types in both the baseline and 12-month follow-up periods compared with the other cohorts (P < 0.001 for comparison across cohorts). All-cause total costs at 12 months were numerically highest for the cohorts defined by the presence of HF (CKD+HF, mean [SD] $47,668 [$53,978]; CKD+HF+T2DM, mean [SD] $54,477 [$57,430] compared with the other cohorts (CKD-only, mean [SD] $24,180 [$37,623]; CKD+T2DM, $29,602 [$40,963]) (P < 0.001 for comparison across cohorts). Relative spending across cohorts was similar for CKD-related total costs at 12 months.
Conclusions: Older adults with a new diagnosis of CKD experienced considerable clinical and economic burden, and presence of T2DM and HF was associated with larger burden. All-cause mean total costs at 12 months after a new diagnosis of CKD ranged from $24,180 for the CKD-only cohort to $54,477 for the CKD+HF+T2DM cohort.
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