Patient-Reported Financial Toxicity Associated With Management of Nephrolithiasis

Abstract

Objective: To characterize stone-related financial burden among adults with nephrolithiasis through validated questionnaires for financial toxicity.

Methods: We performed a cross-sectional survey of adults with history of nephrolithiasis at an outpatient clinic. The survey contained a measure of stone-related financial toxicity (COST score), and assessed demographics, stone event history, and burden of overall, ancillary, preventative, and insurance costs. A COST score ≤21 was classified as high financial toxicity. Multivariable logistic regression was used to evaluate associations with demographic variables and stone event history.

Results: One hundred patients completed the survey (median age 57, IQR, 48-64). The median COST score was 30 (IQR, 23-37), and 19% reported high financial toxicity. Insurance status, household income, stone surgeries during lifetime and within the last 3 years were associated with financial toxicity on univariable analysis (P <.05). Burden of costs was significantly higher in all categories within the high financial toxicity cohort (each P <.05). On multivariable logistic regression, only income >$75,000 remained significant within the second model (OR: 0.22, 95% CI, 0.05-0.77, P = .02), however, this relationship did not persist on the final model. When asked whether providers should be mindful of their financial situation prior to making treatment recommendations, 39% responded "quite a bit" or "very much."

Conclusion: One in 5 patients seeking care for nephrolithiasis meet criteria for high financial toxicity. Financial toxicity was associated with household income, insurance, education, and frequency of stone events. Thirty-nine percent reported that their provider should be mindful of their financial situation when making recommendations.