Abstract
Background/Aims: Hyperphosphatemia is associated with higher mortality and increased incidence of end-stage renal disease in patients with non-dialysis dependent CKD( NDD-CKD), but there has not been a concomitant assessment of mortality and progressive kidney disease that would also account for cumulative effects of hyperphosphatemia. Methods: In order to account for the cumulative effects of abnormal serum phosphorus we examined associations of not only baseline, but also time-averaged serum phosphorus levels with all-cause mortality, the composite ofmortality or ESRD and the slopes of estimated glomerular filtration rate (eGFR), by using Cox models and mixed effects models in a contemporary cohort of 713 males with moderate and advanced NDD-CKD. Results: Higher baseline and time-averaged serum phosphorus were both associated withmortality and with the composite outcome. A 1 mg/dl higher time-averaged serum phosphorus was associated with a multivariable adjusted hazard ratio of all-cause mortality (95% CI) of 1.56 (1.19 - 2.05), p = 0.001. Higher serum phosphorus was associated with a steeper slope of eGFR in unadjusted analyses, but this association became non-significant after multivariable adjustments. Conclusion: The cumulative burden of hyperphosphatemia is associated with increased mortality in patients with moderate and advanced NDD-CKD. Clinical trials are needed to determine if lowering serum phosphorus can result in improved mortality in this population.
Original language | English (US) |
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Pages (from-to) | 268-275 |
Number of pages | 8 |
Journal | Clinical nephrology |
Volume | 73 |
Issue number | 4 |
DOIs | |
State | Published - Apr 2010 |
Externally published | Yes |
Keywords
- Chronic kidney disease
- Glomerular filtration rate
- Mortality
- Phosphorus
ASJC Scopus subject areas
- Nephrology