Serum Phosphorus and Progression of CKD and Mortality: A Meta-analysis of Cohort Studies

Jingjing Da, Xinfang Xie, Myles Wolf, Sinee Disthabanchong, Jinwei Wang, Yan Zha, Jicheng Lv*, Luxia Zhang, Haiyan Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

Background Recent studies have indicated that phosphorus may play an independent pathogenic role in chronic kidney disease (CKD) progression, but some of those studies were underpowered and yielded inconsistent results. Study Design Systematic review and meta-analysis. Setting & Population Non-dialysis-dependent patients with CKD (transplant recipients were excluded). Selection Criteria for Studies Studies assessing the risk ratio of serum phosphorus level on kidney failure and mortality for non-dialysis-dependent patients with CKD published from January 1950 to June 2014 were included following systematic searching of MEDLINE, EMBASE, and the Cochrane Library. Predictor Serum phosphorus level. Outcome Kidney failure, defined as doubled serum creatinine level, 50% decline in estimated glomerular filtration rate, or end-stage kidney disease. Results In 12 cohort studies with 25,546 patients, 1,442 (8.8%) developed kidney failure and 3,089 (13.6%) died. Overall, every 1-mg/dL increase in serum phosphorus level was associated independently with increased risk of kidney failure (hazard ratio, 1.36; 95% CI, 1.20-1.55) and mortality (hazard ratio, 1.20; 95% CI, 1.05-1.37). Limitations Existence of potential residual confounding could not be excluded. Conclusions This meta-analysis suggests an independent association between serum phosphorus level and kidney failure and mortality among non-dialysis-dependent patients with CKD and suggests that large-scale randomized controlled trials should target disordered phosphorus homeostasis in CKD.

Original languageEnglish (US)
Pages (from-to)258-265
Number of pages8
JournalAmerican Journal of Kidney Diseases
Volume66
Issue number2
DOIs
StatePublished - Aug 1 2015

Keywords

  • Index Words Serum phosphorus
  • chronic kidney disease (CKD)
  • disease progression
  • disease trajectory
  • kidney failure
  • meta-analysis
  • mortality
  • non-dialysis-dependent CKD
  • phosphorus homeostasis
  • prognosis
  • renal outcome

ASJC Scopus subject areas

  • Nephrology

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