Abstract 2568: Cerebral Infarcts in Blacks vs Whites: the Southall and Brent REvisited (SABRE) Multi-ethnic Cohort Study

Stroke ◽  
2012 ◽  
Vol 43 (suppl_1) ◽  
Author(s):  
Dean Shibata ◽  
Therese Tillin ◽  
Norman Beauchamp ◽  
John Heasman ◽  
Wadyslaw Gedroyc ◽  
...  

Introduction: Stroke mortality is doubled in people of Black African descent compared with Whites, but factors responsible for this excess are unclear. We wished to compare infarct like lesions (ILL) on MRI by ethnicity and the role of risk factors. Methods: SABRE is a UK community based multi-ethnic cohort of men and women aged 40-69 years at baseline (1988-1990), and 58-86 years at follow up (2008-2011). At follow up, a questionnaire was completed and investigations performed including resting and ambulatory BP, anthropometry, and bloods for glucose and lipids. Cerebral MRI scans were scored for infarcts independently by two readers according to the Cardiovascular Health Study protocol. Results: Of 2346 Whites, 684 attended follow up, and 590 completed cerebral MRI. Of 801 Blacks (first generation migrants of Black African descent to the UK), 232 attended clinic and 207 completed MRI. Mortality loss was greater in Whites (605, 25%) than Blacks (121, 15%)(p<0.0001), although stroke was more likely the underlying cause in Blacks (23, 19%), than Whites (43, 7%)(p<0.0001) . Baseline systolic/diastolic BP was similarly higher in Blacks than Whites in attendees (8/5 mmHg), non-responders (7/6 mm Hg), and those who died (8/5 mmHg). At follow up stroke risk factors were adverse in Blacks, apart from smoking ( table ). Prevalence of ILL was similar by ethnicity, not differing when those <65 years were analysed separately, or when those with stroke/TIA history were excluded. Associations between ILL and risk factors did not differ by ethnicity. But prescribed treatment in those with elevated clinic BP (≥140 mmHg systolic, or ≥90 mmHg diastolic) was 83% in Blacks, 63% in Whites (p<0.0001). Further, in those with an ILL, 95% of Blacks, and 69% (p<0.0001) of Whites were on treatment. Conclusion: Equivalence of ILL rates in Blacks and Whites was unanticipated, given the greater stroke mortality in Blacks. Mitigating against selective mortality as the explanation of our findings is the similar ethnic differential in baseline BP in survivors and non-survivors, the lower overall mortality in Blacks, and overall small numbers of stroke deaths. A more likely explanation is that better targeted more aggressive treatment is now occurring in Blacks than Whites, reducing their potential burden of ILL.

2016 ◽  
Vol 6 (3) ◽  
pp. 129-139 ◽  
Author(s):  
Parveen K. Garg ◽  
Willam J.H. Koh ◽  
Joseph A. Delaney ◽  
Ethan A. Halm ◽  
Calvin H. Hirsch ◽  
...  

Background: Population-based risk factors for carotid artery revascularization are not known. We investigated the association between demographic and clinical characteristics and incident carotid artery revascularization in a cohort of older adults. Methods: Among Cardiovascular Health Study participants, a population-based cohort of 5,888 adults aged 65 years or older enrolled in two waves (1989-1990 and 1992-1993), 5,107 participants without a prior history of carotid endarterectomy (CEA) or cerebrovascular disease had a carotid ultrasound at baseline and were included in these analyses. Cox proportional hazards multivariable analysis was used to determine independent risk factors for incident carotid artery revascularization. Results: Over a mean follow-up of 13.5 years, 141 participants underwent carotid artery revascularization, 97% were CEA. Baseline degree of stenosis and incident ischemic cerebral events occurring during follow-up were the strongest predictors of incident revascularization. After adjustment for these, factors independently associated with an increased risk of incident revascularization were: hypertension (HR 1.53; 95% CI: 1.05-2.23), peripheral arterial disease (HR 2.57; 95% CI: 1.34-4.93), and low-density lipoprotein cholesterol (HR 1.23 per standard deviation [SD] increment [35.4 mg/dL]; 95% CI: 1.04-1.46). Factors independently associated with a lower risk of incident revascularization were: female gender (HR 0.51; 95% CI: 0.34-0.77) and older age (HR 0.69 per SD increment [5.5 years]; 95% CI: 0.56-0.86). Conclusions: Even after accounting for carotid stenosis and incident cerebral ischemic events, carotid revascularization is related to age, gender, and cardiovascular risk factors. Further study of these demographic disparities and the role of risk factor control is warranted.


Circulation ◽  
2008 ◽  
Vol 118 (suppl_18) ◽  
Author(s):  
Christopher Defilippi ◽  
Robert Christenson ◽  
John Gottdiener ◽  
Willem J Kop ◽  
Stephen L Seliger

In the elderly, with decades of exposure to cardiovascular (CV) risk factors, CV prognosis is often considered static. We hypothesized that CV risk is dynamic reflected by changes in NTproBNP over time. We measured NTproBNP at baseline and after 2–3 years in the Cardiovascular Health Study. Long-term risk of CV death according to change in NTproBNP was estimated with the Kaplan-Meier method. We used Cox models to test if effect of change in NTproBNP was independent of demographic and CV risk factors, baseline NTproBNP, renal function, coronary disease, and CV medications. Participants were categorized at baseline as < (low) or >=190pg/mL (high) levels, based on an observed increase in risk above this level. A significant change in NTproBNP category was defined as a change of >25% to a level above or below this cut-point, based on the reported biological variability of NTproBNP. Change in NTproBNP was also evaluated as a continuous measure. Serial NTproBNP levels were measured in 2,975 (86%) of 3,469 participants (age 75±5 years) without heart failure and who had a follow-up visit. CV death was different between those with low levels that remained low (n=1,774) vs. those with low levels that became high (n=468) (1.1 vs. 2.7 per 100 person-yrs, p<.001) and those with high levels that remained high (n=621) vs. those with high levels that became low (n=112) (4.2 vs. 1.6 per 100 person-yrs, p<.001) (figure ). As a continuous measure, change in NTproBNP was linearly associated with CV mortality risk after adjustment (per Ln-fold increment: RR=1.47, p<.001). Dynamic changes in NTproBNP levels reflect dramatic change in CV prognosis in the elderly. Proportion without Cardiovascular death, by initial and follow-up NT-proBNP


Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Rajat Deo ◽  
Faye Lopez ◽  
Ronit Katz ◽  
Selcuk Adabag ◽  
Lin Y Chen ◽  
...  

Introduction: Most cases of sudden cardiac death (SCD) in the general population occur primarily among persons who do not have any prior history of clinical heart disease. Hypothesis: After evaluating a comprehensive panel of traditional and novel cardiovascular risk factors in two, large, racially diverse, population-based cohorts, we sought to develop a predictive model of SCD among US adults without a history of cardiovascular disease. Methods: We evaluated a series of 26 demographic, clinical, laboratory and electrocardiographic measures in participants who were free of baseline cardiovascular disease in the Atherosclerosis Risk in Communities (ARIC) Study (n=13,677) and the Cardiovascular Health Study (CHS) (n=3,650). Results: After a median follow-up of approximately 13 years, there were a combined total of 318 adjudicated SCD events for analysis. The following 11 risk factors were significant risk factors for SCD after meta-analyzing the findings from each cohort: age (per 5 years; HR 1.32, 95% CI [1.17 - 1.49]), male sex (HR 2.23; 1.70 - 2.93]), African American race (HR 1.62, 1.19 - 2.20), current smoking (HR 2.19, 1.65 - 2.92), low physical activity (HR 1.42, 1.09 - 1.85), hypertension (HR 1.82, 1.37 - 2.42), diabetes (HR 2.49, 1.86 - 3.34), low serum albumin (per 0.3 g/dL decrease; HR 1.38, 1.20 - 1.59), low HDL (<40 mg/dL in men and <50 mg/dL in women; HR 1.37, 1.05 - 1.80), eGFR<60 ml/min/1.73m2 (HR 1.77, 1.16 - 2.71), and a prolonged QTc interval (≥440 milliseconds in men or ≥460 milliseconds in women; HR 2.08, 1.54 - 2.80). Over a 10-year follow-up period, a model combining these risk factors showed good to excellent discrimination for SCD risk (C statistic 0.831 in ARIC and 0.745 in CHS). Serum biomarkers including C-reactive protein (CRP), NT-pro-brain natriuretic peptide (BNP) and high sensitivity troponin T were not significant risk factors and did not enhance SCD risk prediction when added to the final multivariate model. Conclusions: A prediction model including demographic, clinical, laboratory, and electrocardiographic variables provided accurate information on the future SCD risk in middle-aged and elderly populations.


Stroke ◽  
2001 ◽  
Vol 32 (suppl_1) ◽  
pp. 363-363
Author(s):  
Charles B Bernick ◽  
Lewis H Kuller ◽  
Will T Longstreth ◽  
Corinne Dulberg ◽  
Teri A Manolio ◽  
...  

P136 Objective: Silent infarcts seen on cranial MRI scans are a risk factor for subsequent clinical stroke in the elderly. This study examines the type of clinical strokes seen in those with silent infarcts. Methods: Cranial MRI examination was completed on 3324 Cardiovascular Health Study (CHS) participants aged 65+ who were without a prior history of clinical stroke. Incident strokes were identified over an average follow-up of 4 years and classified as hemorrhagic or ischemic. Ischemic strokes were further subdivided into lacunar, cardioembolic, atherosclerotic or other/unknown. Results: Silent MRI infarcts >3mm were found in approximately 28% (n=923). Of these, 7% (n=67) subsequently had a clinically evident stroke. The characteristics of the silent MRI infarcts in those who sustained an incident stroke were as folows: 56 had only subcortical infarcts, of which 55 were <20mm; 4 had only cortical infarcts; and 7 had both cortical and subcortical infarcts. Of those with only subcortical silent MRI infarcts, 16% (n=9) went on to a hemorrhagic stroke and 84% (n=47) sustained an ischemic stroke. The ischemic strokes were subtyped as 12 cardioembolic, 3 lacunar, 2 atherosclerotic and 30 unknown/other. Considering only those with cortical silent infarcts, either alone or in combination with subcortical infarcts, there was 1 hemorrhagic stroke and 10 ischemic strokes. Half of the ischemic strokes were cardioembolic and half were unknown type. Conclusion: Elderly individuals with silent subcortical infarcts who go onto subsequent stroke may be at risk not only for lacunar infarcts but also cardioembolic or hemorrhagic strokes.


2019 ◽  
Vol 32 (10) ◽  
pp. 1013-1020 ◽  
Author(s):  
David M Tehrani ◽  
Wenjun Fan ◽  
Vijay Nambi ◽  
Julius Gardin ◽  
Calvin H Hirsch ◽  
...  

AbstractBackgroundHigh-sensitivity cardiac troponin T (hs-cTnT) is individually associated with incident hypertension (HTN) and cardiovascular disease (CVD) events. We hypothesize that the increases in hs-cTnT with increases in blood pressure will be related to higher incidence of CVD.METHODSThe Cardiovascular Health Study is a longitudinal cohort of older adults. Those with hs-cTnT data and CVD risk factors at baseline and follow-up (2–3 years later) were stratified based on systolic blood pressure (SBP; optimal: <120 mm Hg, intermediate: 120–139 mm Hg, elevated: ≥140 mm Hg) and hs-cTnT (undetectable: <5 ng/l, detectable: 5–13 ng/l, elevated: ≥14 ng/l) categories. SBP and hs-cTnT were classified as increased or decreased if they changed categories between exams, and stable if they did not. Cox regression evaluated incident CVD events over an average 9-year follow-up.RESULTSAmong 2,219 adults, 510 (23.0 %) had decreased hs-cTnT, 1,279 (57.6 %) had stable hs-cTnT, and 430 (19.4 %) had increased hs-cTnT. Those with increased hs-cTnT had a higher CVD risk with stable SBP (hazard ratio [HR]: 1.28 [1.04–1.57], P = 0.02) or decreased SBP (HR: 1.57 [1.08–2.28], P = 0.02) compared to those within the same SBP group but a stable hs-cTnT. In those with lower SBP at follow-up, there was an inverse relation between diastolic blood pressure (DBP) and risk of CVD events in those with increased hs-cTnT (HR: 0.44 per 10 mm Hg increase, P < 0.01).CONCLUSIONAn increase in hs-cTnT over time is associated with a higher risk of CVD even when the blood pressure is stable or decreases over time.


2014 ◽  
Vol 237 (1) ◽  
pp. 336-342 ◽  
Author(s):  
Michelle C. Odden ◽  
Michael G. Shlipak ◽  
Heather E. Whitson ◽  
Ronit Katz ◽  
Patricia M. Kearney ◽  
...  

2020 ◽  
pp. injuryprev-2019-043499
Author(s):  
Elizabeth A Phelan ◽  
Eileen Rillamas-Sun ◽  
Lisa Johnson ◽  
Michael J LaMonte ◽  
David M Buchner ◽  
...  

ObjectiveTo identify the risk factors of women who fell with injury relative to women who did not fall or fell without injury and to describe the circumstances and consequences of injurious and non-injurious falls.MethodsWe analysed 5074 older women from the Objective Physical Activity and Cardiovascular Health Study who prospectively tracked their falls using a 13-month calendar. Women with a reported fall were phone interviewed about fall-related details, including injuries. Risk factors were identified from surveys and clinical home visits. Logistic regression models were used to calculate adjusted ORs and 95% CIs for injurious falls relative to not falling or falling without injury. Circumstances of injurious and non-injurious falls were compared.ResultsAt least one fall was experienced by 1481 (29%) participants. Of these, 1043 were phone interviewed, of whom 430 (41%) reported at least one injurious fall. Relative to not falling, the risk factor most strongly associated with experiencing an injurious fall was having fallen ≥2 times (OR 4.0, CI 2.7 to 5.8) in the past year. Being black was protective for fall-related injury (OR 0.6, CI 0.4 to 0.9). No strong associations in risk factors were observed for injurious relative to non-injurious falls. Injurious falls were more likely to occur away from and outside of the home (p<0.05). Over half of those who injured self-managed their injury.ConclusionFalling repeatedly is a powerful risk factor for injurious falls. Those who have fallen more than once should be prioritised for interventions to mitigate the risk of an injurious fall.


Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 3448-3448
Author(s):  
Neil A Zakai ◽  
Benjamin French ◽  
Alice Arnold ◽  
Anne Newman ◽  
Linda F. Fried ◽  
...  

Abstract Introduction: Anemia is associated with increased morbidity and mortality in the elderly, though the risk factors for and the consequences of hemoglobin (HGB) decline are poorly characterized. Methods: We studied 5201 men and women ≥65 participating in the Cardiovascular Health Study. The cohort was followed biannually and had baseline and repeat hemograms 3 years later. HGB decline was defined as >1g/dL HGB drop, or incident anemia at 3 years by WHO criteria. Results: 4006 participants survived to 3 years and had two HGB measures. The median HGB change was −0.2g/dL (IQR-0.8, 0.1). 961 (24%) participants had a >1g/dL HGB drop and 335 (8%) developed incident anemia. The left side of the table presents adjusted logistic regression models of baseline risk factors for HGB decline. Those with baseline cardiovascular disease (CVD), diabetes and kidney disease were more likely to develop >1g/dL HGB drop while only baseline kidney disease was associated with incident anemia. The table also shows the adjusted risk of HGB decline with concurrent development of co-morbid conditions. A >1g/dL drop in HGB was more likely in those who concurrently developed incident CVD, hypertension or inflammation. Incident anemia was more likely in participants with concurrent development of kidney disease or inflammation. Both incident anemia and a HGB drop >1g/dL were associated with subsequent 9-year mortality adjusting for age, race, gender, year 3 HGB, hypertension, CVD, diabetes, and renal disease; HRs (95% CI) 1.4 (1.2, 1.6) and 1.2 (1.1, 1.4) respectively. Discussion: Among studied factors, baseline CVD, diabetes and kidney disease were risk factors for >1g/dL HGB drop while only baseline kidney disease was a risk factor for incident anemia. Incident CVD and hypertension were associated concurrently with >1g/dL HGB drop while kidney disease was associated with concurrent incident anemia. Inflammation development was the strongest risk factor accompanying HGB decline. HGB decline, especially a 1g/dL drop, was associated with subsequent mortality irrespective of HGB concentration. These data suggest that small HGB changes not captured by the WHO anemia criteria are associated with poor health outcomes and that inflammation is a major correlate of HGB decline in the elderly. Table: Risk Factors for HGB Decline in Age-, Race-, Gender, and Baseline HGB-Adjusted Logistic Regression Models Baseline Risk Factors for HGB Decline Risk of HGB Decline with Concurrent Conditions HGB Drop >1g/dL Incident Anemia HGB Drop >1g/dL Incident Anemia CVD 1.2 (1.1, 1.4) 1.0 (0.8, 1.3) 1.3 (1.1, 1.6) 1.0 (0.7, 1.3) Hypertension 1.1 (0.99, 1.3) 1.1 (0.8, 1.2) 1.4 (1.1, 1.7) 1.1 (0.8, 1.5) Diabetes 1.3 (1.1, 1.5) 1.1 (0.8, 1.4) 0.9 (0.6, 1.4) 0.8 (0.4, 1.7) Kidney Disease (GFR <60ml/min/1.73m2) 1.2 (1.0, 1.3) 1.3 (1.1, 1.7) 1.1 (0.8, 1.4) 1.5 (1.0, 2.1) Inflammation CRP ≥10mg/dL or WBC≥15×109/mm3 1.0 (0.8, 1.3) 1.3 (0.99 1.8) 2.3 (1.8, 2.8) 2.3 (1.8, 3.0)


2015 ◽  
Vol 12 (2) ◽  
pp. 170-183 ◽  
Author(s):  
Lewis H. Kuller ◽  
Oscar L. Lopez ◽  
James T. Becker ◽  
Yuefang Chang ◽  
Anne B. Newman

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