Dataset Information

Traditional and non-traditional risk factors for incident peripheral arterial disease among patients with chronic kidney disease.

ABSTRACT:

Background

The risk of peripheral arterial disease (PAD) is higher in patients with chronic kidney disease (CKD) compared with those without. However, reasons for this increased risk are not fully understood.

Methods

We studied risk factors for incident PAD among 3169 participants in the Chronic Renal Insufficiency Cohort (CRIC) Study. Patients with CKD aged 21-74 years were recruited between 2003 and 2008 and followed for a median of 6.3 years. Incident PAD was defined as a new onset ankle-brachial index (ABI) of <0.9 or confirmed clinical PAD.

Results

In a multivariate-adjusted model, older age, female sex, non-Hispanic Black, current smoking, diabetes, higher pulse pressure, lower high-density lipoprotein cholesterol, higher low-density lipoprotein cholesterol, and lower estimated glomerular filtration rate were significantly associated with the increased risk of incident PAD. After adjustment for these traditional risk factors as well as use of medications and CRIC Study clinic sites, the following baseline novel risk factors were significantly associated with risk of incident PAD [hazard ratio and 95% confidence interval (CI) for a one standard deviation (SD) higher level]: log[C-reactive protein (CRP)] (1.16, 1.06-1.25, P < 0.001), white blood cell count (1.09, 1.01-1.18, P = 0.03), fibrinogen (1.15, 1.06-1.26, P = 0.002), log(myeloperoxidase) (1.12, 1.03-1.23, P = 0.01), uric acid (0.88, 0.80-0.97, P = 0.01), glycated hemoglobin (1.16, 1.05-1.27, P = 0.003), log(homeostatic model assessment-insulin resistance) (1.21, 1.10-1.32, P < 0.001) and alkaline phosphatase (1.15, 1.07-1.24, P < 0.001).

Conclusions

Among patients with CKD, inflammation, prothrombotic state, oxidative stress, glycated hemoglobin, insulin resistance and alkaline phosphatase are associated with an increased risk of PAD, independent of traditional risk factors.

SUBMITTER: Chen J

PROVIDER: S-EPMC4917062 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature

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Publications

Traditional and non-traditional risk factors for incident peripheral arterial disease among patients with chronic kidney disease.

Chen Jing J Mohler Emile R ER Xie Dawei D Shlipak Michael M Townsend Raymond R RR Appel Lawrence J LJ Ojo Akinlolu A Schreiber Martin M Nessel Lisa L Zhang Xiaoming X Raj Dominic D Strauss Louise L Lora Claudia M CM Rahman Mahboob M Hamm L Lee LL He Jiang J

Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association 20151218 7

<h4>Background</h4>The risk of peripheral arterial disease (PAD) is higher in patients with chronic kidney disease (CKD) compared with those without. However, reasons for this increased risk are not fully understood.<h4>Methods</h4>We studied risk factors for incident PAD among 3169 participants in the Chronic Renal Insufficiency Cohort (CRIC) Study. Patients with CKD aged 21-74 years were recruited between 2003 and 2008 and followed for a median of 6.3 years. Incident PAD was defined as a new o ...[more]

PMID: 26682964

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Project description:Importance:Early identification of individuals at elevated risk of developing chronic kidney disease (CKD) could improve clinical care through enhanced surveillance and better management of underlying health conditions. Objective:To develop assessment tools to identify individuals at increased risk of CKD, defined by reduced estimated glomerular filtration rate (eGFR). Design, Setting, and Participants:Individual-level data analysis of 34 multinational cohorts from the CKD Prognosis Consortium including 5?222?711 individuals from 28 countries. Data were collected from April 1970 through January 2017. A 2-stage analysis was performed, with each study first analyzed individually and summarized overall using a weighted average. Because clinical variables were often differentially available by diabetes status, models were developed separately for participants with diabetes and without diabetes. Discrimination and calibration were also tested in 9 external cohorts (n?=?2?253?540). Exposures:Demographic and clinical factors. Main Outcomes and Measures:Incident eGFR of less than 60 mL/min/1.73 m2. Results:Among 4?441?084 participants without diabetes (mean age, 54 years, 38% women), 660?856 incident cases (14.9%) of reduced eGFR occurred during a mean follow-up of 4.2 years. Of 781?627 participants with diabetes (mean age, 62 years, 13% women), 313?646 incident cases (40%) occurred during a mean follow-up of 3.9 years. Equations for the 5-year risk of reduced eGFR included age, sex, race/ethnicity, eGFR, history of cardiovascular disease, ever smoker, hypertension, body mass index, and albuminuria concentration. For participants with diabetes, the models also included diabetes medications, hemoglobin A1c, and the interaction between the 2. The risk equations had a median C statistic for the 5-year predicted probability of 0.845 (interquartile range [IQR], 0.789-0.890) in the cohorts without diabetes and 0.801 (IQR, 0.750-0.819) in the cohorts with diabetes. Calibration analysis showed that 9 of 13 study populations (69%) had a slope of observed to predicted risk between 0.80 and 1.25. Discrimination was similar in 18 study populations in 9 external validation cohorts; calibration showed that 16 of 18 (89%) had a slope of observed to predicted risk between 0.80 and 1.25. Conclusions and Relevance:Equations for predicting risk of incident chronic kidney disease developed from more than 5 million individuals from 34 multinational cohorts demonstrated high discrimination and variable calibration in diverse populations. Further study is needed to determine whether use of these equations to identify individuals at risk of developing chronic kidney disease will improve clinical care and patient outcomes.

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Dataset Information

Traditional and non-traditional risk factors for incident peripheral arterial disease among patients with chronic kidney disease.

Background

Methods

Results

Conclusions

Publications

Traditional and non-traditional risk factors for incident peripheral arterial disease among patients with chronic kidney disease.

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