Risk stratification for repeat stone surgery: the role of stone composition

Area of Science:

• Urology
• Nephrology
• Medical Chemistry

Background:

• Kidney stones recur in 30-50% of patients within five years.
• Surgical recurrence of kidney stones presents a significant clinical burden.
• Stone composition analysis is readily available post-surgery and can precede metabolic evaluation.

Purpose of the Study:

• To determine if kidney stone composition alone can predict recurrent stone surgery.
• To offer insights into personalized management strategies for kidney stone recurrence.
• To correlate specific stone compositions with the likelihood and timing of repeat surgical intervention.

Main Methods:

• Retrospective analysis of 8,561 surgically treated patients with available stone composition data.
• Data collected from 2013 to 2020 within a large healthcare provider database.
• Patient data analyzed for up to 5 years post-initial stone surgery.

Main Results:

• 24.5% of patients (2,097) required repeat stone surgery within five years.
• Uric acid, calcium phosphate, infection, brushite, and cystine stones increased surgical recurrence risk by 1.5 to 2.71 times compared to calcium oxalate stones (p < 0.001).
• Cystine and infection stone formers experienced significantly shorter median times to repeat surgery (p < 0.01).

Conclusions:

• Kidney stone composition is a significant predictor of 5-year surgical recurrence rates and time to recurrence.
• Patients forming non-calcium oxalate stones face a higher risk of recurrent stone surgery.
• Informing patients about stone composition risks can enhance adherence to preventive strategies and prioritize proactive management.