J Korean Med Sci.  2017 Sep;32(9):1496-1501. 10.3346/jkms.2017.32.9.1496.

Chronological Trends in Clinical and Urinary Metabolic Features over 20 Years in Korean Urolithiasis Patients

• Kang HW
• Seo SP
• Ha YS
• Kim WT
• Kim YJ
• Yun SJ
• Kim WJ
• Lee SC

• KMID: 2385957
• DOI: http://doi.org/10.3346/jkms.2017.32.9.1496

Abstract

Urolithiasis is common and is becoming more prevalent worldwide. This study assessed the chronological trends in clinical and urinary metabolic features over 20 years in Korean urolithiasis patients. We performed a retrospective analysis of 4,076 patients treated at our clinic from 1996 to 2015. Urinary metabolic data and stone analysis data were available for 1,421 and 723 patients (34.9% and 17.7%), respectively. Patients were categorized into 4 groups according to the date of initial diagnosis: group 1 (1996-2000, n = 897), group 2 (2001-2005, n = 1,018), group 3 (2006-2010, n = 1,043), and group 4 (2011-2015, n = 1,118). Incidental detection of uric acid renal stones has become more prevalent in the past 10 years, accompanied by an increase in body mass index and age at diagnosis. Similarly, the prevalence of diabetes mellitus and of hypertension increased from one group to the next throughout the study period. Levels of 24-hour urinary excretion of sodium, calcium, uric acid, and oxalate have decreased significantly over the study period. The incidence of urinary metabolic abnormalities also showed an identical tendency. The proportion of stones composed of uric acid increased over the study period. In conclusion, incidental detection of uric acid renal stones has become more prevalent in Korea in the past 20 years. Urinary excretion of lithogenic constituents and the incidence of urinary metabolic abnormalities have decreased significantly over this period.

Keyword

Urolithiasis; Risk Factor; Stone Analysis; Uric Acid

MeSH Terms

Body Mass Index
Calcium
Diabetes Mellitus
Diagnosis
Humans
Hypertension
Incidence
Korea
Prevalence
Retrospective Studies
Risk Factors
Sodium
Uric Acid
Urolithiasis*
Calcium
Sodium
Uric Acid

Figure

• 

  Fig. 1 Annual levels of urinary stone-forming constituents in patients with urolithiasis over 20 years. Mean 24-hour urinary excretion of calcium (A), sodium (B), uric acid (C), oxalate (D), and citrate (E) (error bars represent 95% CIs) and the incidence of urinary metabolic abnormalities, hypercaliuria (F), hypernatriuria (G), hyperuricosuria (H), hyperoxaluria (I), and hypocitraturia (J).CI = confidence interval.

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