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Is C-reactive protein a useful predictor of outcome in peritoneal dialysis patients?



Is C-reactive protein a useful predictor of outcome in peritoneal dialysis patients?



Journal of the American Society of Nephrology 12(4): 814-821



An elevated C-reactive protein (CRP) has recently been shown to be strongly predictive of mortality in hemodialysis patients. However, its predictive value in peritoneal dialysis (PD) patients has not been assessed. A cohort of 50 PD patients was followed prospectively for a 3-yr period, after initial determination of CRP. Patients with an elevated CRP (>6 mg/L; n = 29) had significantly reduced plasma prealbumin (0.36 +/- 0.02 versus 0.44 +/- 0.03 g/L; P: < 0.05), decreased total weekly creatinine clearance (C(Cr); 52.5 +/- 2.3 versus 63.1 +/- 3.2 L/1.73 m(2); P: < 0.01), and increased left ventricular thickness (1.24 +/- 0.05 versus 1.08 +/- 0.06 cm; P: < 0.05) at baseline compared with those who had a normal CRP (< or =6 mg/L; n = 21). Baseline CRP (log-transformed) correlated weakly with baseline Kt/V, C(Cr), and pre-albumin. With the use of a multivariate Cox's proportional hazards model to adjust for potential confounding factors, an elevated CRP was predictive of myocardial infarction (adjusted hazard ratio, 4.8; 95% confidence interval [CI], 1.0 to 23; P: = 0.048) and tended to be predictive of fatal myocardial infarction (adjusted hazard ratio, 6.0; 95% CI, 0.8 to 43; P: = 0.07). However, CRP was not significantly associated with all-cause mortality (adjusted hazard ratio, 2.1; 95% CI,0.8 to 5.4; P: = 0.15). In conclusion, CRP elevation occurs in a substantial proportion of PD patients and is independently predictive of future myocardial infarction. Such patients may warrant closer monitoring and attention to modifiable cardiovascular risk factors.

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Accession: 010885945

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PMID: 11274243



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