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Physical activity and change in estimated GFR among persons with CKD.

ABSTRACT: Physical activity may counteract metabolic disturbances that promote the progression of CKD. To address this concept, we performed a longitudinal cohort study of 256 participants in the Seattle Kidney Study, a clinic-based study of CKD. Participants with an estimated GFR (eGFR) of 15-59 ml/min per 1.73 m(2) at baseline were eligible for the study. Physical activity was quantified using the Four-Week Physical Activity History Questionnaire. We used generalized estimating equations to test associations of physical activity with change in eGFR determined by longitudinal measurements of serum cystatin C. Mean baseline eGFR was 42 ml/min per 1.73 m(2). During a median 3.7 years of follow-up, the mean change in eGFRcystatin C was -7.6% per year (interquartile range, -16.8%, 4.9% per year). Participants who reported >150 minutes of physical activity per week had the lowest rate of eGFRcystatin C loss (mean -6.2% per year compared with -9.6% per year among inactive participants). In adjusted analyses, each 60-minute increment in weekly physical activity duration associated with a 0.5% slower decline per year in eGFR (95% confidence interval, 0.02 to 0.98; P=0.04). Results were similar in sensitivity analyses restricted to participants without cardiovascular disease or diabetes, or to participants with moderate/high physical function. After adjustment for eGFR at the time of questionnaire completion, physical activity did not associate with the incidence of ESRD (n=34 events). In summary, higher physical activity levels associated with slower rates of eGFR loss in persons with established CKD.

SUBMITTER: Robinson-Cohen C

PROVIDER: S-EPMC3904564 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature

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Physical activity and change in estimated GFR among persons with CKD.

Robinson-Cohen Cassianne C Littman Alyson J AJ Duncan Glen E GE Weiss Noel S NS Sachs Michael C MC Ruzinski John J Kundzins John J Rock Denise D de Boer Ian H IH Ikizler T Alp TA Himmelfarb Jonathan J Kestenbaum Bryan R BR

Journal of the American Society of Nephrology : JASN 20131212 2

Physical activity may counteract metabolic disturbances that promote the progression of CKD. To address this concept, we performed a longitudinal cohort study of 256 participants in the Seattle Kidney Study, a clinic-based study of CKD. Participants with an estimated GFR (eGFR) of 15-59 ml/min per 1.73 m(2) at baseline were eligible for the study. Physical activity was quantified using the Four-Week Physical Activity History Questionnaire. We used generalized estimating equations to test associa ...[more]

PMID: 24335971

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Project description:BACKGROUND:Several reviews have recently detailed the beneficial effects of weight loss surgery for kidney function. However, these studies have a number of limitations, including small sample size, few done in chronic kidney disease (CKD) stages 3 and 4, and many not including the main bariatric surgery procedures used in the United States today. STUDY DESIGN:This was an observational retrospective cohort study comparing propensity score-matched bariatric surgery patients and nonsurgery control patients who were referred for, but did not have, surgery. Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy were also compared using propensity matching. SETTING & PARTICIPANTS:Patients (714 surgery patients; 714 controls) were from a large integrated health care system, a mean of 58±8 (SD) years old, and mostly women (77%) and non-Hispanic whites (56%) and had diabetes mellitus (66%) and/or hypertension (91%). PREDICTOR:Predictors at the time of surgery or referral to surgery were age, sex, race/ethnicity, weight, and presence of diabetes and/or hypertension. OUTCOMES:The primary outcome for this study was change in estimated glomerular filtration rate (eGFR) from serum creatinine level over a median 3-year follow-up period. MEASUREMENTS:Serum creatinine was used to calculate eGFR using the CKD-EPI (CKD Epidemiology Collaboration) creatinine equation. RESULTS:Surgery patients had 9.84 (95% CI, 8.05-11.62) mL/min/1.73m2 greater eGFRs than controls at a median 3 years' follow-up and RYGB patients had 6.60 (95% CI, 3.42-9.78) mL/min/1.73m2 greater eGFRs than sleeve gastrectomy patients during the same period. LIMITATIONS:This study is limited by its nonrandomized observational study design, estimation of GFR, and large changes in muscle mass, which may affect serum creatinine level independent of changes in kidney function. CONCLUSIONS:Bariatric surgery, especially the RYGB procedure, results in significant improvements for up to 3 years in eGFRs for patients with CKD stages 3 and 4.

Project description:Rationale & objectiveDetermining whether a change in estimated glomerular filtration rate (eGFR) or albuminuria is clinically significant requires knowledge of short-term within-person variability of the measurements, which few studies have addressed in the setting of chronic kidney disease.Study designCross-sectional study with multiple collections over less than 4 weeks.Setting & participantsClinically stable outpatients with chronic kidney disease (N=50; mean age, 56.8 years; median eGFR, 40mL/min/1.73m2; median urinary albumin-creatinine ratio (UACR), 173mg/g).ExposureRepeat measurements from serially collected samples across 3 study visits.OutcomesMeasurements of urine albumin concentration (UAC), UACR, and plasma creatinine, cystatin C, β2-microglobulin (B2M), and beta trace protein (BTP).Analytical approachWe calculated within-person coefficients of variation (CVw) values and corresponding reference change positive and negative (RCVpos and RCVneg) values using log-transformed measurements.ResultsMedian CVw (RCVpos; RCVneg) values of filtration markers were 5.4% (+16%; -14%) for serum creatinine, 4.1% (+12%; -11%) for cystatin C, 7.4% (+23%; -18%) for BTP, and 5.6% (+17%; -14%) for B2M. Results for albuminuria were 33.2% (+145%; -59%) for first-morning UAC, 50.6% (+276%; -73%) for random spot UAC, 32.5% (+141%; -58%) for first-morning UACR, and 29.7% (124%; -55%) for random spot UACR. CVw values for filtration markers were comparable across the range of baseline eGFRs. CVw values for UAC and UACR were comparable across the range of baseline albuminuria values.LimitationsSmall sample size limits the ability to detect differences in variability across markers. Participants were recruited and followed up in a clinical and not research setting, so some preanalytical factors could not be controlled.ConclusionseGFR markers appear to have relatively low short-term within-person variability, whereas variability in albuminuria appears to be high, making it difficult to distinguish random variability from meaningful biologic changes.

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Project description:IntroductionCardiovascular benefits observed with new antidiabetic agents may not extend to chronic kidney disease (CKD) patients. This study performed a systematic review and meta-analysis of cardiovascular outcome trials (CVOTs) using new antidiabetic agents stratified by kidney function.MethodsMEDLINE (via PubMed) and the Cochrane Central Register of Controlled Trials were searched for eligible studies up to November 16, 2020. Data were stratified by the trial entry estimated glomerular filtration rate (eGFR) and albuminuria. Primary major cardiovascular event (MACE) outcomes were extracted, and a meta-analysis with a random effects model was performed to estimate overall risk ratios (RRs).ResultsOur search identified 16 studies for inclusion (glucagon-like peptide-1 [GLP-1] analogues, n = 6; dipeptidyl-peptidase 4 [DPP-4] inhibitors, n = 4; and sodium-glucose cotransporter-2 [SGLT-2] inhibitors, n = 6) with a combined total of 150,816 participants (28.2% with eGFR <60 ml/min per 1.73 m2, n = 42,534). The RR for MACE with GLP-1 analogues with an eGFR ≥60 ml/min per 1.73 m2 was 0.87 (95% confidence interval [CI], 0.77-0.98; P = 0.02) and 0.90 (95% CI, 0.78-1.04; P = 0.14) with an eGFR <60 ml/min per 1.73 m2. The RR for MACE with DPP-4 inhibitors with eGFR ≥60 ml/min per 1.73 m2 was 0.99 (95% CI, 0.92-1.07; P = 0.86) and 0.99 (95% CI, 0.91-1.08; P = 0.86) with an eGFR <60 ml/min per 1.73 m2. The RR for MACE with SGLT-2 inhibitors with an eGFR ≥60 ml/min per 1.73 m2 was 1.01 (95% CI, 0.92-1.10; P = 0.87) and 0.85 (95% CI, 0.75-0.95; P = 0.005) with an eGFR <60 ml/min per 1.73 m2. Most analyses had significant heterogeneity. Sufficient albuminuria data were unavailable to analyze empirically.ConclusionClear evidence for MACE prevention in diabetes patients with an eGFR <60 ml/min per 1.73 m2 currently exists for SGLT-2 inhibitors only. However, similar GLP-1 analogue effect sizes suggest a lack of sufficient power rather than a lack of effect.

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Physical activity and change in estimated GFR among persons with CKD.

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Physical activity and change in estimated GFR among persons with CKD.

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