title: Serum uric acid and mortality in chronic kidney disease: A systematic review and meta-analysis.
abstract: BACKGROUND
  Studies have shown inconsistent results about the association between serum uric acid levels and mortality in patients with chronic kidney disease (CKD).
  
  
  METHODS
  A systematic literature search in MEDLINE, Web of Science and bibliographies of retrieved articles was performed to identify studies investigating the association between serum uric acid and mortality in patients with CKD. Pooled hazard ratios (HR) and corresponding 95% confidence intervals (CIs) were calculated using random-effects models.
  
  
  RESULTS
  A total of 24 studies with 25,453 patients with CKD were included. By meta-analysis, patients with the highest serum uric acid level were associated with a significantly higher risk for mortality (14 studies; HR, 1.52; 95% CI, 1.33-1.73) compared with patients with the lowest serum uric acid level. For dose-response analysis, a linear relationship (8 studies; Pfor non-linearity=0.14) between serum uric acid levels and risk of mortality was found. Overall, an increase of 1mg/dl in serum uric acid level was associated with an 8% increased risk of mortality (21 studies; HR, 1.08; 95% CI, 1.04-1.11).
  
  
  CONCLUSIONS
  Elevated serum uric acid levels are significantly associated with risk of mortality in patients with CKD. Further randomized controlled trials should attempt to determine whether it improves survival to target serum uric acid in patients with CKD.
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China.
authors: Xi
authors: X
authors: Xia
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China.
authors: Qimei
authors: Q
authors: Luo
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China.
authors: Bin
authors: B
authors: Li
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China.
authors: Zhenchuan
authors: Z
authors: Lin
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China.
authors: Xueqing
authors: X
authors: Yu
authors: Department of Nephrology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, People's Republic of China; Key Laboratory of Nephrology, Ministry of Health and Guangdong Province, Guangzhou, 510080, People's Republic of China. Electronic address: hfxyl@163.net.
authors: Fengxian
authors: F
authors: Huang
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D033461:Hyperuricemia / Q000150:complications; D008297:Male; D008875:Middle Aged; D051436:Renal Insufficiency, Chronic / Q000097:blood* / Q000401:mortality*; D018570:Risk Assessment; D014527:Uric Acid / Q000097:blood*
chemical_list: D014527:Uric Acid
keywords: Chronic kidney disease; Meta-analysis; Mortality; Serum uric acid