标题:
ASSOCIATION OF SERUM PHOSPHORUS AND CALCIUM×PHOSPHOATE PRODUCTS WITH MORTALITY IN INCIDENT PERITONEAL DIALYSIS PATIENTS
讲者:
Meiju Wu
单位:
The First Affiliated Hospital Sun Yat-Sen University
播放:
1463
论文摘要:
Objective Disturbances in bone mineral metabolism are common in patients suffering from chronic kidney disease(CKD). The aim of this study was to evaluate the association between bone mineral metabolism parameters(serum phosphorus (Phos), albumin-corrected calcium (CaAlb), intact parathyroid (iPTH), calcium×phosphorus product (Ca×P product)) and all-cause mortality in peritoneal dialysis(PD) patients.
Methods In this single center retrospective cohort study, all incident PD patients from January 1,2006 to December 31,2012 with baseline Phos, CaAlb and iPTH were enrolled and followed up until December 31,2014. Calcium-phosphorus product were calculated. Baseline data included demographic characteristics and clinical and laboratory measurements were collected. The association of Phos, CaAlb, iPTH and Ca×P product with all-cause mortality were assessed using multivariable-adjusted Cox models.
Results Of 1493 patients, mean age was 47.7(±15.3) years, 53.3% of patients were men. During a median 36.5-month (interquatile range(IQR)=30.8-54.1 months) follow-up period, 332(22.2%) patients died. The median serum Phos, CaAlb, iPTH and Ca×P product levels were 4.43mg/dl(IQR=3.65-5.36mg/dl), 9.15mg/dl(IQR=8.74-9.66mg/dl), 243pg/ml (IQR=118-429pg/ml) and 40.7mg2/dl2(IQR=33.7-48.9mg2/dl2), respectively. On multivariate Cox regression analysis, the highest quartile of serum Phos was significantly associated with a hazard ratio(HR)for all-cause mortality of 4.437(95% confidence interval(CI),2.167-9.086,P<0.001).Each 1 mg/dl higher baseline serum Phos levels were associated with 27.7% increased mortality(95% CI,1.147-1.421;P<0.001). Meanwhile,a Ca×P product above 48.9 mg2/dl2 was associated with higher all-cause mortality (HR,4.027;95% CI,1.912-8.480;P<0.001) in PD patients. There was a significant association after adjusted for case-max and plus phosphate binders and Rocaltrol use when serum CaAlb was evaluated as a continuous variable(HR,0.794;95% CI,0.693-0.986;P=0.037). Baseline serum CaAlb level=8.75-9.15mg/dl was associated with lower risk for all-cause mortality in unadjusted model(HR,0.659;95% CI,0.480-0.904;P=0.01). We didn't find any significant association between serum iPTH level and all-cause mortality.
Conclusion Higher serum phosphorus and calcium×phosphate product levels at the commencement of peritoneal dialysis were independently associated with all-cause mortality in peritoneal dialysis patients.