요석의 일회 발생 환자군과 재발 환자군에서 요석대사 위험인자들의 비교

Abstract

Purpose: The aim of this study was to determine whether patients with recurrent stone formations have significant metabolic risk factors compared to patients with first-time stone formations. Materials and Methods: 456 patients who participated in the stone metabolic study at Chung-Ang University Hospital between January 1, 2001 and June 30, 2002 were selected as subjects. 347 patients (211 males, 136 females) with first-time stone formations and 109 patients (77 males, 32 females) with recurrent stone formations were selected. The blood test and 24-hour urine test were categorized and grouped according to: 1) gender; 2) age brackets of 40 and under, 40-49, and 60 and over; 3) and gender-based age bracket distribution. Results: Hypocitraturia was the most common metabolic abnormality in both males and females and in all age groups. Hypocitraturia, in particular, was shown to have more significant associations (p<0.05) in female patients in their 40s and 50s with recurrent stone formations (75%) compared to female patients of the same age range with first-time stone formations (38.6%). In addition, a small urine volume was found to have similar significant associations with these subject groups (p<0.05) with respect to patients with first-time stone formations and recurrent stone formations. Female Patients (especially those in their 40s and 50s) with recurrent stone formations (242.1±158.5) were found to have a higher probability (p<0.05) of hypocitraturia than patients with first-time stone formation (419.9±242.3). Conclusions: In women with recurrent stone formation, hypocitraturia and low urine volume are the risk factors that differentiate them from patients with first-time stone formation. The correction of hypocitraturia & low urine volume may significantly reduce the patients’ chances for recurrent stone formation. (Korean J Urol 2004;45:551-556)