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1.
Front Nephrol ; 3: 1031338, 2023.
Article En | MEDLINE | ID: mdl-37675341

This study examines frailty status evolution observed in a two-year follow-up of a cohort of older persons (age ≥65) with chronic kidney disease (CKD) undergoing maintenance hemodialysis (HD) treatment. Frailty, a geriatric syndrome that connotes a state of low physiologic reserve and vulnerability to stressors, is associated with increased risk for multiple adverse health outcomes in studies of persons with CKD as well as older persons in the general population. The Fried frailty index defines frailty as the presence of 3 or more of 5 indicators-recent unintentional weight loss, slowed gait speed, decreased muscle strength, self-reported exhaustion, and low physical activity. In the seminal work by Fried and colleagues, persons who were characterized by 1-2 of the Fried index criteria were termed "pre-frail" and considered at risk for subsequently becoming frail, potentially providing insight regarding intervention targets that might slow or prevent individuals' transition from pre-frail to frail status. Other less frequently studied types of transitions may also be informative, including "recovery or reversion" (improvement) by people whose longitudinal assessments indicate movement from frailty to prefrailty or robust, or from prefrailty to robust. These status changes are also a potential source of insights relevant for prevention or remediation of frailty, but research focusing on the various ways that individuals may transition between frailty states over time remains limited, and no previous research has examined varying patterns of frailty status evolution in an older cohort of persons with dialysis-dependent CKD. In a study cohort of dialysis-dependent older persons, we characterized patterns of frailty status evolution by age, sex, race/ethnicity, and treatment vintage; by longitudinal profiles of non-sedentary behavior; and by self-report indicators relevant for dimensions emphasized in the Age-Friendly 4Ms Health System (What Matters, Mobility, Mentation). Our study suggests that strategies to promote resiliency among older persons with dialysis-dependent CKD can be informed not only by frailty status transition that indicates improvement over time but also by older adults' maintenance of (stable) robust status over time, and we concur that inclusion of both frailty and resilience measures is needed in future longitudinal studies and clinical trials.

2.
Metabolomics ; 18(4): 23, 2022 04 07.
Article En | MEDLINE | ID: mdl-35391564

INTRODUCTION: Excessive daytime sleepiness is a debilitating symptom of obstructive sleep apnea (OSA) linked to cardiovascular disease, and metabolomic mechanisms underlying this relationship remain unknown. We examine whether metabolites from inflammatory and oxidative stress-related pathways that were identified in our prior work could be involved in connecting the two phenomena. METHODS: This study included 57 sleepy (Epworth Sleepiness Scale (ESS) ≥ 10) and 37 non-sleepy (ESS < 10) participants newly diagnosed and untreated for OSA that completed an overnight in-lab or at home sleep study who were recruited from the Emory Mechanisms of Sleepiness Symptoms Study (EMOSS). Differences in fasting blood samples of metabolites were explored in participants with sleepiness versus those without and multiple linear regression models were utilized to examine the association between metabolites and mean arterial pressure (MAP). RESULTS: The 24-h MAP was higher in sleepy 92.8 mmHg (8.4) as compared to non-sleepy 88.8 mmHg (8.1) individuals (P = 0.03). Although targeted metabolites were not significantly associated with MAP, when we stratified by sleepiness group, we found that sphinganine is significantly associated with MAP (Estimate = 8.7, SE = 3.7, P = 0.045) in non-sleepy patients when controlling for age, BMI, smoking status, and apnea-hypopnea index (AHI). CONCLUSION: This is the first study to evaluate the relationship of inflammation and oxidative stress related metabolites in sleepy versus non-sleepy participants with newly diagnosed OSA and their association with 24-h MAP. Our study suggests that Sphinganine is associated with 24 hour MAP in the non-sleepy participants with OSA.


Sleep Apnea, Obstructive , Sleepiness , Arterial Pressure , Humans , Metabolomics , Sleep Apnea, Obstructive/complications , Sleep Apnea, Obstructive/diagnosis , Sphingosine/analogs & derivatives
3.
Front Aging Neurosci ; 12: 69, 2020.
Article En | MEDLINE | ID: mdl-32457592

Mild cognitive impairment (MCI) and Alzheimer's disease (AD) affect a high proportion of the elderly population with an increasing prevalence. Sleep disturbances are frequent in those with MCI and AD. This review summarizes existing research on sleep disturbances and neuroinflammation in MCI and AD. Although strong evidence supports various pathways linking sleep and AD pathology, the temporal direction of this central relationship is not yet known. Improved understanding of sleep disturbance and neuroinflammation in MCI and AD may aid in the identification of targets for their prevention.

6.
J Clin Psychiatry ; 80(1)2018 12 11.
Article En | MEDLINE | ID: mdl-30549498

OBJECTIVE: To evaluate real, as compared with sham, acupuncture in improving persistent sleep disturbance in veterans with mild traumatic brain injury (mTBI) and posttraumatic stress disorder (PTSD). METHODS: This sham-controlled randomized clinical trial at a US Department of Veterans Affairs Medical Center (2010-2015) included 60 veterans aged 24-55 years (mean of 40 years) with history of mTBI of at least 3 months and refractory sleep disturbance. Most of these participants (66.7%) carried a concurrent DSM-IV clinical diagnosis of PTSD. For the present study, they were randomized into 2 groups and stratified by PTSD status using the PTSD Checklist-Military Version. Each participant received up to 10 treatment sessions. The primary outcome measure was change in baseline-adjusted global Pittsburgh Sleep Quality Index (PSQI) score following intervention. Secondary outcomes were wrist-actigraphy-assessed objective sleep measurements. Comorbid PTSD was analyzed as a covariate. RESULTS: Mean (SD) preintervention global PSQI score was 14.3 (3.2). Those receiving real acupuncture had a global PSQI score improvement of 4.4 points (relative to 2.4 points in sham, P = .04) and actigraphically measured sleep efficiency (absolute) improvement of 2.7% (relative to a decrement of 5.3% in sham, P = .0016). Effective blinding for active treatment was maintained in the study. PTSD participants presented with more clinically significant sleep difficulties at baseline; acupuncture was effective for both those with and without PTSD. CONCLUSIONS: Real acupuncture, compared with a sham needling procedure, resulted in a significant improvement in sleep measures for veterans with mTBI and disturbed sleep, even in the presence of PTSD. These results indicate that an alternative-medicine treatment modality like acupuncture can provide clinically significant relief for a particularly recalcitrant problem affecting large segments of the veteran population. TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT01162317.


Acupuncture Therapy/methods , Outcome Assessment, Health Care/methods , Sleep Wake Disorders/therapy , Adult , Brain Concussion/complications , Humans , Middle Aged , Psychiatric Status Rating Scales , Single-Blind Method , Sleep Wake Disorders/complications , Stress Disorders, Post-Traumatic/complications , United States , United States Department of Veterans Affairs , Veterans/psychology , Young Adult
8.
Healthcare (Basel) ; 5(3)2017 Aug 07.
Article En | MEDLINE | ID: mdl-28783094

Enabling patient ability to work was a key rationale for enacting the United States (US) Medicare program that provides financial entitlement to renal replacement therapy for persons with end-stage kidney disease (ESKD). However, fewer than half of working-age individuals in the US report the ability to work after starting maintenance hemodialysis (HD). Quality improvement is a well-established objective in oversight of the dialysis program, but a more patient-centered quality assessment approach is increasingly advocated. The ESKD Quality Incentive Program (QIP) initiated in 2012 emphasizes clinical performance indicators, but a newly-added measure requires the monitoring of patient depression-an issue that is important for work ability and employment. We investigated depression scores and four dialysis-specific QIP measures in relation to work ability reported by a multi-clinic cohort of 528 working-age maintenance HD patients. The prevalence of elevated depression scores was substantially higher among patients who said they were not able to work, while only one of the four dialysis-specific clinical measures differed for patients able/not able to work. Ability to work may be among patients' top priorities. As the parameters of quality assessment continue to evolve, increased attention to patient priorities might facilitate work ability and employment outcomes.

10.
Hemodial Int ; 20(3): 473-83, 2016 07.
Article En | MEDLINE | ID: mdl-26954723

Introduction Cross-sectional and longitudinal studies in the general population have shown that a physically active lifestyle may have anti-inflammatory properties, but evidence from studies conducted with maintenance hemodialysis (HD) patients is limited. Methods A multicenter prospective cohort of 755 HD participants aged 20-92 was evaluated in a USRDS special study 2009-2013. Kilocalories/week (kcal/week) of leisure time physical activity (LTPA) was estimated from the Minnesota Leisure Time Activity questionnaire. Predialysis serum samples were obtained concurrent with LTPA report date. Generalized estimating equations (GEE) examined association of participants' LTPA and log-normalized CRP across 24 months. Cox proportional hazards models investigated LTPA and survival over a median follow-up of 718 days. Findings Baseline median CRP concentration was lower for participants with 500+ kcal/week LTPA vs. those with <500 kcal/week LTPA (3.4 mg/L vs. 4.6 mg/L; P = 0.03). Participants who reported lower LTPA (<500 kcal/week) at both baseline and 12 months had a borderline significant increase in CRP concentration (within-group change 4.8 [1.9-10.4] to 5.8 [1.6-15.7]; P = 0.08). Lower LTPA was associated with higher log CRP over 24 months in adjusted GEE analyses (ß coefficient = 0.16 [95% CI 0.02-0.31]; P = 0.03). 67/364 (18%) and 43/391 (11%) deaths occurred, respectively, among participants reporting <500 vs. 500+ kcal/week LTPA [adjusted mortality hazard ratio 1.63 (CI, 1.07, 2.47)]. Discussion The data suggest that increased estimated levels of LTPA, a physical activity/exercise opportunity widely applicable to HD patients, may be associated with lower CRP concentration as well as better survival outcome.


C-Reactive Protein/metabolism , Exercise/physiology , Renal Dialysis/methods , Cross-Sectional Studies , Female , Humans , Longitudinal Studies , Male , Middle Aged , Prospective Studies , Renal Dialysis/mortality , Surveys and Questionnaires , Survival Analysis
11.
Am J Nephrol ; 41(4-5): 313-9, 2015.
Article En | MEDLINE | ID: mdl-26089100

BACKGROUND/AIMS: Patients on chronic hemodialysis have a high prevalence of heart disease and poor self-reported physical function. The association between structural heart disease and self-reported physical function in patients on hemodialysis is unknown. METHODS: We studied the association between elevated pulmonary artery systolic pressure (PASP) and self-reported physical function in ESRD in 253 patients in the USRDS ACTIVE/ADIPOSE study between 2009 and 2011. We used multivariate linear regression with PASP obtained from clinical echocardiogram reports as the primary predictor and the Physical Function (PF) subscale of the SF-36 as the primary outcome. To determine whether associations between PASP and PF were driven by fluid overload or left ventricular hypertrophy, we assessed whether PASP was associated with bioimpedance spectroscopy (BIS)-derived extracellular water (ECW) and with left ventricular posterior wall thickness. RESULTS: In a multivariable model, each 10 mm Hg higher PASP was associated with a 3.32-point lower PF score (95% CI -5.95, -0.68). In a multivariable model that included BIS estimates, both left ventricular posterior wall thickness (LVPW, per 5 mm) and ECW were associated with a higher PASP (LVPW 4.21 mm Hg, 95% 0.38-8.04; ECW 1.12 mm Hg per liter, 95% CI 0.07-2.18). Higher LVPW and ECW were independently associated with a lower PF score. CONCLUSION: Left ventricular hypertrophy and elevated pulmonary pressure are associated with worse self-reported physical function in patients on hemodialysis. The role of chronic volume overload on PASP and PF score should be evaluated in a prospective manner.


Activities of Daily Living , Blood Pressure , Hypertrophy, Left Ventricular/diagnostic imaging , Kidney Failure, Chronic/therapy , Pulmonary Artery/diagnostic imaging , Renal Dialysis , Adult , Aged , Cohort Studies , Dielectric Spectroscopy , Echocardiography , Female , Humans , Hypertrophy, Left Ventricular/physiopathology , Kidney Failure, Chronic/physiopathology , Linear Models , Male , Middle Aged , Multivariate Analysis , Prospective Studies , Pulmonary Artery/physiopathology , Self Report , Surveys and Questionnaires , Systole
12.
Am J Kidney Dis ; 66(2): 297-304, 2015 Aug.
Article En | MEDLINE | ID: mdl-25824124

BACKGROUND: Slow walk (gait) speed predicts functional decline, institutionalization, and mortality risks in the geriatric population. A gait speed evidence base for dialysis patient outcomes is needed. STUDY DESIGN: Prospective cohort study. SETTING & PARTICIPANTS: 752 prevalent hemodialysis (HD) patients aged 20 to 92 years evaluated in 2009 to 2012 in 7 Atlanta and 7 San Francisco clinics in a US Renal Data System special study. PREDICTOR: Usual walk speed in meters per second, categorized as ≥0.6 m/s (baseline n=575), <0.6 m/s (baseline n=94), and unable to perform walk test (baseline n=83). OUTCOMES: Survival; hospitalization; activities of daily living (ADL) difficulty; 36-Item Short Form Health Survey (SF-36) Physical Function score. MEASUREMENTS: Cox proportional hazards models investigated gait speed and mortality over a median follow-up of 703 days. Multivariable logistic or linear regression models estimated associations of baseline gait speed with hospitalization, need for ADL assistance, and SF-36 Physical Function score after 12 months. RESULTS: Participants who walked ≥0.6 m/s had 53 (9%) deaths, those who walked <0.6 m/s had 19 (20%) deaths, and those unable to walk had 37 (44%) deaths. Adjusted mortality hazard ratios were 2.17 (95% CI, 1.19-3.98) for participants who walked <0.6 m/s and 6.93 (95% CI, 4.01-11.96) for those unable to walk, compared with participants walking ≥0.6 m/s. After 12 months, compared with baseline walk speed ≥ 1.0 m/s (n=169 participants), baseline walk speed of 0.6 to <0.8 m/s (n=116) was associated with increased odds of hospitalization (OR, 2.04; 95% CI, 1.19-3.49) and ADL difficulty (OR, 3.88; 95% CI, 1.46-10.33) and a -8.20 (95% CI, -13.57 to -2.82) estimated change in SF-36 Physical Function score. LIMITATIONS: Cohort not highly representative of overall US in-center HD population. CONCLUSIONS: Because walking challenges the heart, lungs, and circulatory, nervous, and musculoskeletal systems, gait speed provides an informative marker of health status. The association of gait speed with HD patients' risk for functional decline warrants continued study.


Activities of Daily Living , Gait/physiology , Hospitalization , Kidney Failure, Chronic/therapy , Renal Dialysis , Adult , Aged , Aged, 80 and over , Cohort Studies , Exercise Test , Female , Humans , Kidney Failure, Chronic/mortality , Kidney Failure, Chronic/physiopathology , Male , Middle Aged , Mobility Limitation , Mortality , Prognosis , Prospective Studies , United States , Young Adult
13.
BMC Nephrol ; 16: 32, 2015 Mar 21.
Article En | MEDLINE | ID: mdl-25880589

BACKGROUND: The usage of nursing home (NH) services is a marker of frailty among older adults. Although the Centers for Medicare & Medicaid Services (CMS) revised the Medical Evidence Report Form CMS-2728 in 2005 to include data collection on NH institutionalization, the validity of this item has not been reported. METHODS: There were 27,913 patients ≥ 75 years of age with incident end-stage renal disease (ESRD) in 2006, which constituted our analysis cohort. We determined the accuracy of the CMS-2728 using a matched cohort that included the CMS Minimum Data Set (MDS) 2.0, often employed as a "gold standard" metric for identifying patients receiving NH care. We calculated sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) for the CMS-2728 NH item. Next, we compared characteristics and mortality risk by CMS-2728 and MDS NH status agreement. RESULTS: The sensitivity, specificity, PPV and NPV of the CMS-2728 for NH status were 33%, 97%, 80% and 79%, respectively. Compared to those without the MDS or CMS-2728 NH indicator (No MDS/No 2728), multivariable adjusted hazard ratios (95% confidence interval) for mortality associated with NH status were 1.55 (1.46 - 1.64) for MDS/2728, 1.48 (1.42 - 1.54) for MDS/No 2728, and 1.38 (1.25 - 1.52) for No MDS/2728. NH utilization was more strongly associated with mortality than other CMS-2728 items in the model. CONCLUSIONS: The CMS-2728 underestimated NH utilization among older adults with incident ESRD. The potential for misclassification may have important ramifications for assessing prognosis, developing advanced care plans and providing coordinated care.


Kidney Failure, Chronic/epidemiology , Nursing Homes/statistics & numerical data , Records/standards , Renal Dialysis/statistics & numerical data , Aged , Aged, 80 and over , Centers for Medicare and Medicaid Services, U.S. , Cohort Studies , Female , Forms and Records Control , Frail Elderly , Humans , Incidence , Kidney Failure, Chronic/mortality , Kidney Failure, Chronic/therapy , Male , Patient Care Planning , Prognosis , Risk Assessment , United States/epidemiology
14.
BMC Nephrol ; 15: 177, 2014 Nov 15.
Article En | MEDLINE | ID: mdl-25399253

BACKGROUND: New information from various clinical settings suggests that tight blood pressure control may not reduce mortality and may be associated with more side effects. METHODS: We performed cross-sectional multivariable ordered logistic regression to examine the association between predialysis blood pressure and the short physical performance battery (SPPB) in a cohort of 749 prevalent hemodialysis patients in the San Francisco and Atlanta areas recruited from July 2009 to August 2011 to study the relationship between systolic blood pressure and objective measures of physical function. Mean blood pressure for three hemodialysis sessions was analyzed in the following categories: <110 mmHg, 110-129 mmHg (reference), 130-159 mmHg, and ≥160 mmHg. SPPB includes three components: timed repeated chair stands, timed 15-ft walk, and balance tests. SPPB was categorized into ordinal groups (≤6, 7-9, 10-12) based on prior literature. RESULTS: Patients with blood pressure 130-159 mmHg had lower odds (OR 0.57, 95% CI 0.35-0.93) of scoring in a lower SPPB category than those whose blood pressure was between 110 and 129 mmHg, while those with blood pressure≥160 mmHg had 0.56 times odds (95% CI 0.33-0.94) of scoring in a lower category when compared with blood pressure 110-129 mmHg. When individual components were examined, blood pressure was significantly associated with chair stand (130-159 mmHg: OR 0.59, 95% CI 0.38-0.92) and gait speed (≥160 mmHg: OR 0.59, 95% CI 0.35-0.98). Blood pressure≥160 mmHg was not associated with substantially higher SPPB score compared with 130-159 mmHg. CONCLUSIONS: Patients with systolic blood pressure at or above 130 mmHg had better physical performance than patients with lower blood pressure in the normotensive range. The risk-benefit tradeoff of aggressive blood pressure control, particularly in low-functioning patients, should be reexamined.


Blood Pressure , Kidney Failure, Chronic/physiopathology , Physical Fitness , Renal Dialysis , Adult , Aged , Aged, 80 and over , Antihypertensive Agents/therapeutic use , Comorbidity , Cross-Sectional Studies , Ethnicity/statistics & numerical data , Female , Gait , Humans , Hypertension/drug therapy , Hypertension/epidemiology , Hypertension/physiopathology , Kidney Failure, Chronic/epidemiology , Kidney Failure, Chronic/therapy , Male , Middle Aged , Multivariate Analysis , Overweight/epidemiology , Overweight/physiopathology , Postural Balance
15.
World J Nephrol ; 3(3): 101-6, 2014 Aug 06.
Article En | MEDLINE | ID: mdl-25332901

AIM: To assess the association of measured gait speed with hemodialysis (HD) patients' hospitalization, in conjunction with, and apart from, recent fall history. METHODS: Gait speed was measured by a standard protocol and falls during the past 12 mo were ascertained for a prevalent multi-center HD cohort (n = 668) aged 20-92. Hospitalization during the past 12 mo was identified in the patient's clinic records, and the first hospitalization after gait speed assessment (or the competing event of death) was identified in the 2013 United States Renal Data System Standard Analysis Files. RESULTS: Slow gait speed, defined as < 0.8 m/s, characterized 34.7% of the patients, and 27.1% had experienced a recent fall. Patients with slow gait speed but without a history of recent falls were 1.79 times more likely to have been hospitalized during the past 12 mo (OR = 1.79, 95%CI: 1.11-2.88, P = 0.02), and patients with slow gait speed and a history of recent falls were over two times more likely to have been hospitalized (OR = 2.10, 95%CI: 1.19-3.73, P = 0.01), compared with patients having faster gait speed and no recent fall history. Prospective examination of gait speed/fall history status in relation to first hospitalization (or death) incurred by the end of follow-up December 31, 2011 also showed that slow gait speed was associated with these events in conjunction with a history of falls (HR = 1.54, 95%CI: 1.04-2.30, P = 0.03). CONCLUSION: The International Task Force on Nutrition and Aging reported that gait speed is a powerful predictor for older adults of adverse outcomes such as hospitalization. In our data, gait speed--apart from, as well as in conjunction with, recent fall history--was associated with HD patients' hospitalization for multiple causes. Gait speed may be a sensitive health indicator among HD patients across the age spectrum.

16.
Sleep Med ; 15(10): 1241-5, 2014 Oct.
Article En | MEDLINE | ID: mdl-25156752

OBJECTIVE: The objective of this study was to determine the association between the usage of four classes of "at-risk" medications (antidepressants, neuroleptics, antihistamines, and antiemetics with dopamine blockade) and restless legs syndrome (RLS) in dialysis patients within the United States Renal Data System (USRDS). METHODS: This was a case-control design within a national (United States) patient registry of all patients with end-stage renal disease (ESRD) in the USRDS anytime during the period of 1 October 2006 to 31 December 2010, inclusive. A total of 16,165 ESRD patients (3234 cases; 12,931 age-, sex-, and race-matched controls) were studied. RESULTS: All four classes of "at-risk" medications see widespread use among patients in the USRDS. All were associated with increased odds of an RLS diagnosis (range of odds ratios, 1.47-2.28; all p < 0.0001) during the period of observation. Results were unchanged when controlling for time on hemodialysis. Usage of more than one class of medication increased the odds for having RLS. CONCLUSIONS: ESRD patients often receive medication intended for relief of conditions associated with their disease, such as depression and psychological issues, pruritus, and gastroparesis; however, such medications may increase the risk of RLS. Given the high prevalence of RLS in ESRD patients, these medications should only be used when their benefits clearly outweigh the risk of development of the troubling and distressing symptoms of RLS.


Restless Legs Syndrome/chemically induced , Antidepressive Agents/adverse effects , Antidepressive Agents/therapeutic use , Antiemetics/adverse effects , Antiemetics/therapeutic use , Antipsychotic Agents/adverse effects , Antipsychotic Agents/therapeutic use , Case-Control Studies , Databases, Factual , Female , Histamine Antagonists/adverse effects , Histamine Antagonists/therapeutic use , Humans , Kidney Failure, Chronic , Male , Middle Aged , Restless Legs Syndrome/epidemiology , Restless Legs Syndrome/etiology , United States/epidemiology
17.
Am J Med Sci ; 348(4): 277-82, 2014 Oct.
Article En | MEDLINE | ID: mdl-24762748

BACKGROUND: Although individuals with kidney disease, including those dependent on dialysis, often present clinically with signs and symptoms consistent with frailty, there is limited information about sociodemographic and clinical risk factors that may be associated. METHODS: Seven hundred forty-five patients undergoing hemodialysisbetween 2009 and 2011 in 7 Atlanta dialysis clinics and 7 San Francisco bay area dialysis clinics were assessed using the validated Fried frailty index (recent unintentional weight loss, reported exhaustion, low grip strength, slow walk speed, low physical activity) that defines frailty as the presence of 3 or more criteria. Study coordinators interviewed participants; measured grip strength, walk speed, and body composition; and reviewed records for clinical and laboratory parameters. Logistic regression models were used to estimate the association of patient characteristics with frailty. RESULTS: In adjusted analyses, peripheral vascular disease and cardiac diseases, including dysrhythmia, atrial fibrillation, tachycardia, pericarditis, and cardiac arrest, were associated with higher odds for frailty, whereas black race and higher serum albumin concentration were associated with lower odds for frailty. CONCLUSIONS: In multivariable analyses, the risk for frailty in patients undergoing hemodialysis, as assessed by the presence of 3 or more criteria that comprise the Fried frailty index, was increased in association with peripheral vascular disease and cardiac conditions, such as dysrhythmia and atrial fibrillation, and was decreased for those with higher serum albumin concentration and for blacks compared with whites. Among patients who met the Fried definition of frailty, 78% scored as frail on walk speed and 56% scored as frail on grip strength, the 2 physical performance measures.


Cardiovascular Diseases/epidemiology , Muscle Weakness/epidemiology , Obesity/epidemiology , Renal Dialysis/trends , Adult , Aged , Cardiovascular Diseases/diagnosis , Cardiovascular Diseases/physiopathology , Cohort Studies , Exercise/physiology , Fatigue/diagnosis , Fatigue/epidemiology , Fatigue/physiopathology , Female , Hand Strength/physiology , Humans , Male , Middle Aged , Muscle Weakness/diagnosis , Muscle Weakness/physiopathology , Obesity/diagnosis , Obesity/physiopathology , Prevalence , Renal Dialysis/adverse effects , Risk Factors
18.
J Ren Nutr ; 24(3): 151-156.e1, 2014 May.
Article En | MEDLINE | ID: mdl-24613023

OBJECTIVE: Estimating dietary intake is challenging in patients with chronic diseases. The aim of this study was to calibrate the Block Brief 2000 food frequency questionnaire (BFFQ) using 3-day food diary records among patients on dialysis. METHODS: Data from 3-day food diary records from 146 patients new to dialysis were reviewed and entered into National Cancer Institute self-administered 24-hour dietary recall (ASA24), a web-based dietary interview system. The information was then re-entered omitting foods reported in the diaries that were not in the BFFQ to generate a "BFFQ-restricted" set of intakes. We modeled each major dietary component (i.e., energy [total calories], protein, carbohydrate, fat) separately using linear regression. The main independent variables were BFFQ-restricted food diary estimates computed as the average of the 3 days of diaries, restricted to items included in the BFFQ, with the unrestricted 3-day food diary averages as dependent variables. RESULTS: The BFFQ-restricted diary energy estimate of 1,325 ± 545 kcal was 87% of the energy intake in the full food diary (1,510.3 ± 510.4, P < .0001). The BFFQ-restricted diary carbohydrate intake was 83% of the full food diary (156.7 ± 78.7 g vs. 190.4 ± 72.7, P < .0001). The BFFQ-restricted fat intake was 90% of the full-diary-reported fat intake (50.1 ± 24.1 g vs. 56.4 ± 21.6 g, P < .0001). Daily protein intake assessments were not statistically different by BFFQ-restricted diary and full diary assessment (63.1 ± 28.5 vs. 64.1 ± 21.4 g, P = .60). The associations between BFFQ-restricted diary intake and unrestricted intake were linear. Three-day diary-reported intake could be estimated from BFFQ-restricted intake with r2 ranging from 0.36 to 0.56 (P < .0001 for energy [total calories], protein, carbohydrate, and fat). Final equations did not include adjustments for age, sex, or race because the patterns of associations were not significantly different. CONCLUSION: Energy and macronutrient estimates by BFFQ are lower than estimates from 3-day food diaries, but simple calibration equations can be used to approximate total intake from BFFQ responses.


Diet , Renal Dialysis , Surveys and Questionnaires , Adult , Aged , Aged, 80 and over , Calibration , Dietary Carbohydrates/administration & dosage , Dietary Fats/administration & dosage , Dietary Proteins/administration & dosage , Energy Intake , Female , Humans , Male , Middle Aged , National Cancer Institute (U.S.) , Nutrition Assessment , Renal Insufficiency, Chronic , United States
19.
Hemodial Int ; 18(1): 70-7, 2014 Jan.
Article En | MEDLINE | ID: mdl-24118865

Needing assistance with activities of daily living (ADL) is an early indicator of functional decline and has important implications for individuals' quality of life. However, correlates of need for ADL assistance have received limited attention among patients undergoing maintenance hemodialysis (HD). A multicenter cohort of 742 prevalent HD patients was assessed in 2009-2011 and classified as frail, prefrail and nonfrail by the Fried frailty index (recent unintentional weight loss, reported exhaustion, low grip strength, slow walk speed, low physical activity). Patients reported need for assistance with 4 ADL tasks and identified contributing symptoms/conditions (pain, balance, endurance, weakness, others). Nearly 1 in 5 patients needed assistance with 1 or more ADL. Multivariable analysis showed increased odds for needing ADL assistance among frail (odds ratio [OR] 11.35; 95% confidence interval [CI] 5.50-23.41; P < 0.001) and prefrail (OR 1.93; 95% CI 1.01-3.68; P = 0.046) compared with non-frail patients. In addition, the odds for needing ADL assistance were lower among blacks compared with whites and were higher among patients with diabetes, lung disease, and stroke. Balance, weakness, and "other" (frequently dialysis-related) symptoms/conditions were the most frequently named reasons for ADL difficulty. In addition to interventions such as increasing physical activity that might delay or reverse the process of frailty, the immediate symptoms/conditions to which individuals attribute their ADL difficulty may have clinical relevance for developing targeted management and/or treatment approaches.


Activities of Daily Living , Hand Strength , Muscle Weakness , Renal Dialysis , Weight Loss , Adult , Aged , Female , Humans , Male , Middle Aged , Muscle Weakness/etiology , Muscle Weakness/physiopathology , Retrospective Studies
20.
Clin Kidney J ; 7(3): 257-63, 2014 Jun.
Article En | MEDLINE | ID: mdl-25852886

BACKGROUND: Falls among patients undergoing maintenance hemodialysis (HD) have significant consequences for quality of life and functional independence, morbidity, healthcare utilization and even mortality, but studies on the etiology of falls within large HD cohorts are limited. METHODS: Falls during the past 12 months were ascertained for a prevalent multi-center HD cohort (n = 762) aged 20-92 years, and associations with demographic and treatment characteristics, comorbidities, cognitive function, prescribed medications, balance tests, frailty and depressive symptoms were assessed. RESULTS: Falls were sustained by 28.4% of participants. In multivariable-adjusted analyses, participants classified as frail were over two times more likely to report falls [odds ratio (OR): 2.39, 95% confidence interval (CI): 1.22-4.71, P = 0.01], and participants with a CES-D score 18+ and/or prescribed antidepressants were over 80% more likely to be fallers (OR: 1.83, 95% CI: 1.23-2.74, P = 0.003) than were participants with a CES-D score <18 and no prescribed antidepressants. CONCLUSIONS: Frailty and depressed mood, factors that are potentially modifiable, are prominently associated with falls.

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