Serum bicarbonate levels and the progression of kidney disease: a cohort study.

Serum bicarbonate levels and the progression of kidney disease: a cohort study.
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血清碳酸氢盐水平和肾脏疾病的进展:一项队列研究。

DOI:
10.1053/j.ajkd.2009.02.014
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发表时间:
2009-08
期刊:
American journal of kidney diseases : the official journal of the National Kidney Foundation
影响因子:
--
通讯作者:
Melamed ML
Melamed ML
中科院分区:
其他
文献类型:
--
作者:
Shah SN;Abramowitz M;Hostetter TH;Melamed ML

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肾病动物模型已将代谢性酸中毒与肾损伤联系起来。低血清碳酸氢盐水平在人类肾脏疾病进展中的作用尚未研究。回顾性队列研究。地点和参与者:2001 年 1 月 1 日至 2003 年 12 月 31 日到纽约布朗克斯医疗诊所就诊的成年人均被纳入研究(n=5,422),并随访至 2007 年 6 月 30 日 血清碳酸氢盐水平 肾脏疾病进展定义为估计肾小球滤过率 (eGFR) 下降 50% 或达到 eGFR <15 ml/min/1.73m2 (n=337)。记录患者的基线人口统计数据、合并症、实验室数据和社会经济状况。连续收集门诊患者血清肌酐(中位数,每人 5 次测量)。平均年龄为 52 岁,69% 为女性,45% 为非洲裔美国人,31% 为西班牙裔,21% 患有糖尿病,41% 患有高血压,9% 的基线 eGFR <60 ml/min/1.73m2。根据上述定义,337 名患者 (6.2%) 的肾脏疾病出现进展。与参考组(碳酸氢盐水平 25-26 mEq/L)相比,调整潜在混杂因素后,碳酸氢盐水平≤22 mEq/L 的进展风险比为 1.54(95% CI 1.13-2.09),23-24 mEq/L 的进展风险比为 0.97(95% CI 0.70-1.35),1.14(95% CI)。 0.84-1.55) 对于水平 ≥27 mEq/L。 (模型中包含血清碳酸氢盐的全局 p 值为 0.01)。当使用不同的结果定义(eGFR 下降 30%,1288 个结果(24%))或血清肌酐加倍(268 个结果(4.9%))时,这些结果仍然相似。研究中使用的数据是出于临床而非研究目的而收集的。低血清碳酸氢盐与肾脏疾病的进展相关,与基线 eGFR 和其他临床、人口和社会经济因素无关。需要前瞻性研究来证实这种关系并评估碱补充剂减缓进展的功效。
Animal models of kidney disease have linked metabolic acidosis with renal damage. The role of low serum bicarbonate levels in kidney disease progression in humans has not been studied. Retrospective cohort study. Setting & Participants: Adults visiting a medical clinic in the Bronx, NY from 01/01/01 to 12/31/03 were included in the study (n=5,422) and followed until 6/30/07 Serum bicarbonate levels Kidney disease progression was defined as either a decline in the estimated glomerular filtration rate (eGFR) by 50% or reaching an eGFR of <15 ml/min/1.73m2 (n=337). Patients’ baseline demographics, comorbidities, laboratory data and socioeconomic status were recorded. Serial outpatient serum creatinines were collected (median, 5 measurements/ person). The mean age was 52 years, 69% were women, 45% were African-American, 31% were Hispanic, 21% had diabetes mellitus, 41% had hypertension, and 9% had a baseline eGFR <60 ml/min/1.73m2. Kidney disease progressed by the definition above in 337 patients (6.2%). Compared to the reference group (bicarbonate level 25-26 mEq/L), the hazard ratio for progression after adjustment for potential confounders was 1.54 (95% CI 1.13-2.09) for bicarbonate levels ≤22 mEq/L, 0.97 (95% CI 0.70-1.35) for levels 23-24 mEq/L and 1.14 (95% CI 0.84-1.55) for levels ≥27 mEq/L. (Global p-value for inclusion of serum bicarbonate in the model, 0.01). These results remained similar when using different definitions of the outcome (an eGFR decline by 30%, 1288 outcomes (24%)) or doubling of serum creatinine (268 outcomes (4.9%)). Data used in study was collected for clinical, not research, purposes. Low serum bicarbonate is associated with the progression of kidney disease, independent of baseline eGFR and other clinical, demographic and socioeconomic factors. Prospective studies are needed to confirm this relationship and to evaluate the efficacy of alkali supplements for slowing progression.
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