title: [Percentage of uric acid calculus and its metabolic character in Dongjiang River valley].
abstract: OBJECTIVE
  To study the percentage of uric acid calculus in uroliths and its metabolic character in Dongjiang River valley.
  
  
  METHODS
  To analyze the chemical composition of 290 urinary stones by infrared (IR) spectroscopy and study the ratio changes of uric acid calculus. Uric acid calculus patients and healthy people were studied. Personal characteristics, dietary habits were collected. Conditional logistic regression was used for data analysis and studied the dietary risk factors of uric acid calculus. Patients with uric acid calculus, calcium oxalate and those without urinary calculus were undergone metabolic evaluation analysis. The results of uric acid calculus patients compared to another two groups to analysis the relations between the formation of uric acid calculus and metabolism factors.
  
  
  RESULTS
  Uric acid calculi were found in 53 cases (18.3%). The multiple logistic regression analysis suggested that low daily water intake, eating more salted and animal food, less vegetable were very closely associated with uric acid calculus. Comparing to calcium oxalate patients, the urine volume, the value of pH, urine calcium, urine oxalic acid were lower, but uric acid was higher than it. The value of pH, urine oxalic acid and citric acid were lower than them, but uric acid and urine calcium were higher than none urinary calculus peoples. Blood potassium and magnesium were lower than them.
  
  
  CONCLUSIONS
  The percentage of uric acid stones had obvious advanced. Less daily water intake, eating salted food, eating more animal food, less vegetables and daily orange juice intake, eating sea food are the mainly dietary risk factors to the formation of uric acid calculus. Urine volume, the value of pH, citric acid, urine calcium, urine uric acid and the blood natrium, potassium, magnesium, calcium, uric acid have significant influence to the information of uric acid stones.
authors: Department of Urology, University Hospital, Macao, China. zhonghx@126.com
authors: Hong-Heng
authors: HH
authors: Chong
authors: Geng
authors: G
authors: An
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D002648:Child; D002681:China / Q000453:epidemiology; D004032:Diet; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D045483:Rivers; D014527:Uric Acid / Q000378:metabolism*; D014545:Urinary Calculi / Q000453:epidemiology* / Q000209:etiology / Q000378:metabolism; D055815:Young Adult
chemical_list: D014527:Uric Acid