Mediation of the Associations of Physical Activity With Cardiovascular Events and Mortality by Diabetes in Older Mexican Americans

Abstract Low physical activity (PA) among older adults increases the risk of cardiovascular disease (CVD) and mortality through metabolic disorders such as type 2 diabetes. We aimed to elucidate the extent to which diabetes mediates the effect of nonoccupational PA levels on CVD and mortality among older Mexican Americans. This study included 1,676 adults from the Sacramento Area Latino Study on Aging (1998–2007). We employed Cox proportional hazards regression models to investigate associations of PA level with all-cause mortality, fatal CVD, and nonfatal CVD events. Utilizing causal mediation analysis within a counterfactual framework, we decomposed the total effect of PA into natural indirect and direct effects. Over a median of 8 years of follow-up, low PA (<25th percentile) was associated with increased risks of all-cause mortality (hazard ratio (HR) = 1.36, 95% confidence interval (CI): 1.06, 1.75), fatal CVD (HR = 2.05, 95% CI: 1.42, 2.97), and nonfatal CVD events (HR = 1.67, 95% CI: 1.18, 2.37) in comparison with high PA (>75th percentile). Diabetes mediated 11.0%, 7.4%, and 5.2% of the total effect of PA on all-cause mortality, fatal CVD, and nonfatal CVD events, respectively. Our findings indicate that public health interventions targeting diabetes prevention and management would be a worthwhile strategy for preventing CVD and mortality among older Mexican Americans with insufficient PA levels.

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Effects of Low-density Lipoprotein Cholesterol on Cardiovascular Disease and All-cause Mortality in Elderly Patients (≥75 years old)

10.21203/rs.3.rs-549837/v1 ◽

2021 ◽

Author(s):

Jiaxin Yu ◽

xiaokun liu ◽

shuohua chen ◽

yan liu ◽

hongmin liu ◽

...

Keyword(s):

Proportional Hazards ◽

Low Density Lipoprotein ◽

Density Lipoprotein ◽

Cox Proportional Hazards ◽

Cvd Risk ◽

Proportional Hazards Regression ◽

All Cause Mortality ◽

Level Group ◽

The Ideal

Abstract Background: The associations of low-density lipoprotein cholesterol (LDL-C) with cardiovascular disease (CVD) and all-cause mortality are unclear in elderly(≥75 years) Chinese individuals.Methods: A total of 3674 individuals aged 75 or older underwent medical examinations at the Kailuan Group in 2006. Participants were divided into three groups by LDL_C values: the ideal level (LDL-C <2.6 mmol/l), appropriate level (2.6 mmol/l≤ LDL-C＜3.4 mmol/l) and elevated level (LDL-C≥3.4 mmol/l) groups. CVD and all-cause mortality events were recorded during the follow-up period. The Cox proportional hazards regression model was applied to evaluate the effect of LDL-C on CVD and all-cause mortality events.Results: The average follow-up time was 9.87±3.60 years.After adjustment for confounding factors, the multivariate Cox proportional hazards regression model showed that CVD risk in the elevated group was 1.46 (95% CI, 1.08-1.97), acute myocardial infarction risk was 2.08 (95% CI, 1.26-3.44), and all-cause mortality risk in the appropriate level group and elevated group was 1.12 (95% CI, 1.00-1.25) and 1.17 (95% CI, 1.00-1.36), respectively, compared with those in the ideal level group. For every standard deviation increase in LDL-C, CVD risk increased by 10%, acute myocardial infarction risk increased by 21%, and all-cause mortality event risk increased by 4%. No association was found between elevated LDL-C levels and the risk of stroke.Conclusions: In the elderly population, elevated LDL-C levels are a risk factor for CVD and all-cause mortality.

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Abstract P288: Exposure To Psychological And Physical Challenges Immediately Prior To Myocardial Infarction And Increased 10-year Mortality

Circulation ◽

10.1161/circ.129.suppl_1.p288 ◽

2014 ◽

Vol 129 (suppl_1) ◽

Author(s):

Loes Smeijers ◽

Elizabeth Mostofsky ◽

Willem J Kop ◽

Murray A Mittelman

Keyword(s):

Physical Activity ◽

Myocardial Infarction ◽

Mortality Rate ◽

Proportional Hazards ◽

Coffee Consumption ◽

Cox Proportional Hazards ◽

Sensitivity Analyses ◽

Risk Indicator ◽

All Cause Mortality

Objective: To examine the association between exposure to psychological (anger, anxiety) and physical (high activity levels, coffee consumption) challenge immediately prior to myocardial infarction (MI) as risk indicator of mortality at 10-year follow-up. Methods: Participants of the Determinants of Myocardial Infarction Onset Study (N=2176, mean age 60.1±12.5 yrs, 29.2% women) were interviewed to assess exposure to several potential triggers immediately prior to MI, including anger, anxiety, physical activity and coffee. All-cause mortality was assessed using the National Death Index for 10 years follow-up. We constructed Cox proportional hazards models with 95% confidence intervals to examine the relationship between exposure to these potential triggers in the 2 hours prior to MI onset and the rate of all-cause mortality, adjusting for demographic and clinical characteristics. Results: Exposure to anger, anxiety, physical activity or coffee consumption prior to MI was associated with a 30% higher mortality rate over 10 years (HR=1.30, 95%CI=1.06-1.59, p =0.011) compared to patients who were not exposed to any of these potential triggers. This association was stronger for the first 3 years of follow-up (HR=1.59, 95%CI=1.16-2.19, p =0.004) and weaker for years 3 to 10 (HR=1.14, 95%CI=0.88-1.48, p =0.32). In separate analyses for each exposure, there was a higher mortality rate associated with anxiety (HR=1.44, 95%CI=1.09-1.91, p =0.010) and a suggestion of a higher rate for anger (HR=1.33, 95%CI=0.97-1.81, p =0.075), but no association for physical activity or coffee consumption. Sensitivity analyses showed stronger associations for women than men, and patients aged 65 and older compared to younger patients. Discussion: MI following episodes of anger, anxiety, physical activity or coffee consumption is associated with higher all-cause mortality in the following 10 years. This association was strongest for anxiety and slightly lower for anger but there was no evidence of a higher mortality rate among MI patients reporting physical activity or coffee consumption immediately prior to MI.

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The Roles of Physical Activity and Inflammation in Mortality, Cognition, and Depressive Symptoms Among Older Mexican Americans

American Journal of Epidemiology ◽

10.1093/aje/kwz180 ◽

2019 ◽

Vol 188 (11) ◽

pp. 1944-1952

Author(s):

I-Fan Shih ◽

Mary N Haan ◽

Kimberly C Paul ◽

Yu Yu ◽

Janet S Sinsheimer ◽

...

Keyword(s):

Physical Activity ◽

Depressive Symptoms ◽

Mexican Americans ◽

Inflammatory Markers ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Total Effect ◽

Tnf Α ◽

Metabolic Equivalent Of Task ◽

Factor Α

Abstract A higher level of physical activity (PA) is associated with decreased risk of mortality, dementia, and depression, yet the mechanisms involved are not well understood, and little evidence exists for Mexican Americans. With data from the Sacramento Area Latino Study on Aging (1998–2007), we used Cox proportional hazards regression to separately evaluate associations of baseline PA level with mortality, dementia/cognitive impairment without dementia (CIND), and depressive symptoms, and we estimated the mediating effects of inflammatory markers in additive hazard models. A low level of PA (<35 metabolic equivalent of task–hours/week) was associated with increased mortality (hazard ratio (HR) = 1.50, 95% confidence interval (CI): 1.20, 1.88), dementia/CIND (HR = 1.37, 95% CI: 0.96, 1.96), and depressive symptoms (HR = 1.23, 95% CI: 1.00, 1.52). A low PA level added 512 (95% CI: −34, 1,058) cases of dementia/CIND per 100,000 person-years at risk (direct effect), while, through a mediating path, interleukin 6 (IL-6) added another 49 (95% CI: 5, 94) cases, or 9% of the total effect. For mortality, 8%–10% of the PA total effect was mediated through IL-6, tumor necrosis factor α (TNF-α), or TNF-α receptors. None of the inflammatory markers mediated the association between PA and depressive symptoms. Our results suggest that antiinflammation (especially as assessed by IL-6 and TNF-α levels) may partly explain how PA protects against dementia/CIND and mortality.

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Sex-Specific Associations between Blood Pressure and Risk of Atrial Fibrillation Subtypes in the Tromsø Study

Journal of Clinical Medicine ◽

10.3390/jcm10071514 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1514

Author(s):

Hilde Espnes ◽

Jocasta Ball ◽

Maja-Lisa Løchen ◽

Tom Wilsgaard ◽

Inger Njølstad ◽

...

Keyword(s):

Atrial Fibrillation ◽

Blood Pressure ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Pressure Management ◽

Reference Models ◽

Proportional Hazards Regression ◽

Hazard Ratios ◽

Increased Risk

The aim of this study was to explore sex-specific associations between systolic blood pressure (SBP), hypertension, and the risk of incident atrial fibrillation (AF) subtypes, including paroxysmal, persistent, and permanent AF, in a general population. A total of 13,137 women and 11,667 men who participated in the fourth survey of the Tromsø Study (1994–1995) were followed up for incident AF until the end of 2016. Cox proportional hazards regression analysis was conducted using fractional polynomials for SBP to provide sex- and AF-subtype-specific hazard ratios (HRs) for SBP. An SBP of 120 mmHg was used as the reference. Models were adjusted for other cardiovascular risk factors. Over a mean follow-up of 17.6 ± 6.6 years, incident AF occurred in 914 (7.0%) women (501 with paroxysmal/persistent AF and 413 with permanent AF) and 1104 (9.5%) men (606 with paroxysmal/persistent AF and 498 with permanent AF). In women, an SBP of 180 mmHg was associated with an HR of 2.10 (95% confidence interval [CI] 1.60–2.76) for paroxysmal/persistent AF and an HR of 1.80 (95% CI 1.33–2.44) for permanent AF. In men, an SBP of 180 mmHg was associated with an HR of 1.90 (95% CI 1.46–2.46) for paroxysmal/persistent AF, while there was no association with the risk of permanent AF. In conclusion, increasing SBP was associated with an increased risk of both paroxysmal/persistent AF and permanent AF in women, but only paroxysmal/persistent AF in men. Our findings highlight the importance of sex-specific risk stratification and optimizing blood pressure management for the prevention of AF subtypes in clinical practice.

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Replacement of potatoes with other vegetables and risk of myocardial infarction in the Danish Diet, Cancer and Health cohort

British Journal Of Nutrition ◽

10.1017/s0007114521000349 ◽

2021 ◽

pp. 1-21

Author(s):

Anne Mette L. Würtz ◽

Mette D. Hansen ◽

Anne Tjønneland ◽

Eric B. Rimm ◽

Erik B. Schmidt ◽

...

Keyword(s):

Myocardial Infarction ◽

Similar Pattern ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Heterogeneous Group ◽

Dietary Guidelines ◽

Cox Proportional Hazards Regression ◽

Proportional Hazards Regression ◽

Root Vegetables

ABSTRACT Intake of vegetables is recommended for the prevention of myocardial infarction (MI). However, vegetables make up a heterogeneous group, and subgroups of vegetables may be differentially associated with MI. The aim of this study was to examine replacement of potatoes with other vegetables or subgroups of other vegetables and the risk of MI. Substitutions between subgroups of other vegetables and risk of MI were also investigated. We followed 29,142 women and 26,029 men aged 50-64 years in the Danish Diet, Cancer and Health cohort. Diet was assessed at baseline by using a detailed validated FFQ. Hazards ratios (HR) with 95% CI for the incidence of MI were calculated using Cox proportional hazards regression. During 13.6 years of follow-up, 656 female and 1,694 male cases were identified. Among women, the adjusted HR for MI was 1.02 (95% CI: 0.93, 1.13) per 500 g/week replacement of potatoes with other vegetables. For vegetable subgroups, the HR was 0.93 (95% CI: 0.77, 1.13) for replacement of potatoes with fruiting vegetables and 0.91 (95% CI: 0.77, 1.07) for replacement of potatoes with other root vegetables. A higher intake of cabbage replacing other vegetable subgroups was associated with a statistically non-significant higher risk of MI. A similar pattern of associations was found when intake was expressed in kcal/week. Among men, the pattern of associations was overall found to be similar to that for women. This study supports food-based dietary guidelines recommending to consume a variety of vegetables from all subgroups.

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Consumption of flavonoid-rich fruits, flavonoids from fruits, and stroke risk: a prospective cohort study

British Journal Of Nutrition ◽

10.1017/s0007114521000404 ◽

2021 ◽

pp. 1-26

Author(s):

Qi Gao ◽

Jia-Yi Dong ◽

Renzhe Cui ◽

Isao Muraki ◽

Kazumasa Yamagishi ◽

...

Keyword(s):

Lower Risk ◽

Stroke Risk ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Dietary Factors ◽

Citrus Fruits ◽

Proportional Hazards Regression ◽

Hazard Ratios ◽

Index Study

Abstract We sought to examine the prospective associations of specific fruit consumption, in particular flavonoid-rich fruit (FRF) consumption, with the risk of stroke and subtypes of stroke in a Japanese population. A study followed a total of 39,843 men and 47,334 women aged 44-76 years, and free of cardiovascular disease, diabetes, and cancer at baseline since 1995 and 1998 to the end of 2009 and 2012, respectively. Data on total and specific FRF consumption for each participant were obtained using a self-administrated food frequency questionnaire. The hazard ratios (HRs) of stroke in relation to total and specific FRF consumption were estimated through Cox proportional hazards regression models. During a median follow-up of 13.1 years, 4092 incident stroke cases (2557 cerebral infarctions and 1516 hemorrhagic strokes) were documented. After adjustment for age, body mass index, study area, lifestyles, dietary factors, and other risk factors, it was found that total FRF consumption was associated with a significantly lower risk of stroke in women (HR= 0.70; 95% CI, 0.58-0.84), while the association in men was not significant (HR= 0.93; 95% CI, 0.79-1.09). As for specific FRFs, consumptions of citrus fruits, strawberries, and grapes were found associated with a lower stroke risk in women. Higher consumptions of FRFs, in particular citrus fruits, strawberries, and grapes, were associated with a lower risk of developing stroke in Japanese women.

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Development and Validation of a Prognostic Nomogram Model for Recurrence of Non-Muscle Invasive Bladder Cancer

10.21203/rs.3.rs-691739/v1 ◽

2021 ◽

Author(s):

Sanhe Liu ◽

Yongzhi Li ◽

Diansheng Cui ◽

Yuexia Jiao ◽

Liqun Duan ◽

...

Keyword(s):

Bladder Cancer ◽

Risk Stratification ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Muscle Invasive Bladder Cancer ◽

Clinicopathologic Characteristics ◽

Cox Proportional Hazards Regression ◽

Proportional Hazards Regression ◽

Muscle Invasive

Abstract BackgroundDifferent recurrence probability of non-muscle invasive bladder cancer (NMIBC) requests different adjuvant treatments and follow-up strategies. However, there is no simple, intuitive, and generally accepted clinical recurrence predictive model available for NMIBC. This study aims to construct a predictive model for the recurrence of NMIBC based on demographics and clinicopathologic characteristics from two independent centers. MethodsDemographics and clinicopathologic characteristics of 511 patients with NMIBC were retrospectively collected. Recurrence free survival (RFS) was estimated using the Kaplan-Meier method and log-rank tests. Univariate Cox proportional hazards regression analysis was used to screen variables associated with RFS, and a multivariate Cox proportional hazards regression model with a stepwise procedure was used to identify those factors of significance. A final nomogram model was built using the multivariable Cox method. The performance of the nomogram model was evaluated with respect to its calibration, discrimination, and clinical usefulness. Internal validation was assessed with bootstrap resampling. X-tile software was used for risk stratification calculated by the nomogram model. ResultsIndependent prognostic factors including tumor stage, recurrence status, and European Association of Urology (EAU) risk stratification group were introduced to the nomogram model. The model showed acceptable calibration and discrimination (area under the receiver operating characteristic [ROC] curve was 0.85; the consistency index [C-index] was 0.79 [95% CI: 0.76 to 0.82]), which was superior to the EAU risk stratification group alone. The decision curve also proved well clinical usefulness. Moreover, all populations could be stratified into three distinct risk groups by the nomogram model. ConclusionsWe established and validated a novel nomogram model that can provide individual prediction of RFS for patients with NMIBC. This intuitively prognostic nomogram model may help clinicians in postoperative treatment and follow-up decision-making.

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Association Between Change in Accelerometer-Measured and Self-Reported Physical Activity and Cardiovascular Disease in the Look AHEAD Trial

10.2337/figshare.17157926 ◽

2022 ◽

Author(s):

John M. Jakicic ◽

Robert I. Berkowitz ◽

Paula Bolin ◽

George A. Bray ◽

Jeanne M. Clark ◽

...

Keyword(s):

Physical Activity ◽

Type 2 Diabetes ◽

Cardiovascular Disease ◽

Proportional Hazards ◽

Secondary Analysis ◽

Cox Proportional Hazards ◽

Self Report ◽

Look Ahead ◽

The Look

OBJECTIVE: To conduct post-hoc secondary analysis examining the association between change in physical activity (PA), measured with self-report and accelerometry, from baseline to 1 and 4 years and cardiovascular disease (CVD) outcomes in the Look AHEAD Trial. RESEARCH DESIGN AND METHODS: Participants were adults with overweight/obesity and type 2 diabetes with PA data at baseline and year 1 or 4 (n = 1,978). Participants were randomized to diabetes support and education or intensive lifestyle intervention. Measures included accelerometry-measured moderate-to-vigorous PA (MVPA), self-reported PA, and composite (morbidity and mortality) CVD outcomes. RESULTS: In pooled analyses of all participants, using Cox proportional hazards models, each 100 MET-min/wk increase in accelerometry-measured MVPA from baseline to 4 years was associated with decreased risk of the subsequent primary composite outcome of CVD. Results were consistent for changes in total MVPA [HR=0.97 (95% CI: 0.95, 0.99)] and MVPA accumulated in >10-minute bouts [HR=0.95 (95% CI: 0.91, 0.98)], with a similar pattern for secondary CVD outcomes. Change in accelerometry-measured MVPA at 1 year and self-reported change in PA at 1 and 4 years were not associated with CVD outcomes. CONCLUSIONS: Increased accelerometry-measured MVPA from baseline to year 4 is associated with decreased risk of CVD outcomes. This suggests the need for long-term engagement in MVPA to reduce the risk of CVD in adults with overweight/obesity and type 2 diabetes.

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Associations of Diet Quality and All-Cause Mortality Across Levels of Cardiometabolic Health and Disease: A 7.6-Year Prospective Analysis From the Dutch Lifelines Cohort

10.2337/figshare.13964039 ◽

2021 ◽

Author(s):

Petra C Vinke ◽

Gerjan Navis ◽

Daan Kromhout ◽

Eva Corpeleijn

Keyword(s):

Type 2 Diabetes ◽

Diet Quality ◽

Total Population ◽

Proportional Hazards ◽

Cox Proportional Hazards ◽

Dietary Guidelines ◽

Cardiometabolic Health ◽

Ageing Population ◽

All Cause Mortality

Objective: To simultaneously investigate the association of diet quality and all-cause mortality in groups with varying cardiometabolic diseases (CMDs) at baseline. Design: From the population-based Lifelines cohort, 40,892 non-underweight participants aged ≥50 years with data on diet quality and confounding factors were included (enrollment 2006-2013). From food frequency questionnaire data, tertiles of the Lifelines diet score were calculated (T1 = poorest, T3 = best diet quality). Four CMD categories were defined: 1) CMD-free, 2) type 2 diabetes, 3) one cardiovascular disease (CVD), 4) two or more CMDs. Months when deaths occurred were obtained from municipal registries up until November 2019. Multivariable Cox proportional hazards models were applied for the total population and stratified by CMD categories. Results: After a median follow-up of 7.6 years, 1,438 participants died. Diet quality and CMD categories were independently associated with all-cause mortality in crude and adjusted models (p < 0.001). A dose-response relationship of diet quality with all-cause mortality was observed in the total population (P for trend < 0.001, T2 vs. T3 = 1.22 (1.07-1.41), T1 vs. T3 = 1.57 (1.37-1.80)). In stratified analyses, the association was significant for CMD-free individuals (T1 vs. T3 = 1.63 (1.38-1.93)) and for type 2 diabetes patients (1.87 (1.17-3.00)), but not for patients with one CVD (1.39 (0.93-2.08)) or multiple CMDs (1.19 (0.80-1.76)). Conclusions: A high-quality diet can potentially lower all-cause mortality risk in the majority of the ageing population. Its effect may be greatest for CMD-free individuals and patients with type 2 diabetes. Tailored dietary guidelines may be required for patients with extensive histories of CMDs.

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Abstract P281: All-cause and Cardiovascular Mortality in Men With High Levels of Physical Activity and Coronary Artery Calcification

Circulation ◽

10.1161/circ.137.suppl_1.p281 ◽

2018 ◽

Vol 137 (suppl_1) ◽

Author(s):

Laura F Defina ◽

Nina B Radford ◽

David Leonard ◽

Stephen W Farrell ◽

Andjelka Pavlovic ◽

...

Keyword(s):

Physical Activity ◽

Coronary Artery ◽

Coronary Artery Calcification ◽

Proportional Hazards ◽

Subclinical Atherosclerosis ◽

Activity Level ◽

Mortality Hazard ◽

Hazard Ratios ◽

All Cause Mortality

Introduction: Recent studies have suggested that extreme levels of physical activity (endurance athletes) are associated with subclinical atherosclerosis as well as increased mortality. The safety of continuing high levels of physical activity is uncertain once coronary artery calcification (CAC) is discovered. Hypothesis: We hypothesized that men performing &ge3000 MET·minutes/week of physical activity would have greater all-cause and cardiovascular (CV) mortality compared to those with &lt1500 or 1500-&lt3000 MET·minutes/week of physical activity and that mortality risk would be greater in those with CAC&ge100 compared to &lt100 Agatston units. Methods: The cohort studied included 16,109 men without prevalent CV disease who reported physical activity levels and underwent EBT or MDCT scan. Physical activity was categorized into &ge3000 (n=1,266), 1500-3000 (n=3,027), and &lt1500 (n=11,816) MET·minutes/week. CAC scanning included EBT scans (1997-2007) or MDCT scans (2007-2013), and CAC score was categorized into &ge100 (n=3,547) and &lt100 (n=12,562) Agatston units. We fit separate proportional hazards regression models to follow-up times for all-cause and CV mortality. The models included all combinations of CAC and physical activity categories and were adjusted for baseline age, smoking, BMI, cholesterol, HDLc, and systolic blood pressure. Results: The average age of participants at baseline was 51.3±8.3 years. Men with the highest activity level had a lower BMI and higher HDLc. After an average follow-up of 8.9 years, there were 329 all-cause and 60 CV deaths, including 174 all-cause and 38 CV deaths in those with CAC&ge100. The sample had 80% power to detect all-cause mortality hazard ratios &ge 1.9 and 1.8 for physical activity &ge3000 versus &lt1500 in those with CAC&lt100 and &ge100, respectively. The corresponding minimum detectable CV mortality hazard ratios were 3.5 and 2.8. Comparing physical activity &ge3000 to &lt1500 in those with CAC&ge100, the hazard ratios (95% CI) were 0.9 (0.5, 1.5) for all-cause mortality and 0.9 (0.3, 3.1) for CV mortality. Hazard ratios were similar when comparing physical activity &ge3000 to 1500-&lt3000 in those with CAC &ge100. Finally, when comparing physical activity categories, there was no evidence that hazard ratios varied by CAC category, p&gt0.7. Conclusions: This sample offers no evidence that levels of activity &ge3000 MET·minutes/week are associated with increased all-cause or CV mortality compared to those with &lt1500 or 1500- &lt3000 MET·minutes/week, regardless of CAC level.

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