@article {7787, title = {Sleep characteristics that predict atrial fibrillation.}, journal = {Heart Rhythm}, volume = {15}, year = {2018}, month = {2018 Sep}, pages = {1289-1295}, abstract = {

BACKGROUND: The relationship between sleep disruption, independent of obstructive sleep apnea (OSA), and atrial fibrillation (AF) is unknown.

OBJECTIVE: The purpose of this study was to determine whether poor sleep itself is a risk factor for AF.

METHODS: We first performed an analysis of participants in the Health eHeart Study and validated those findings in the longitudinal Cardiovascular Health Study, including a subset of patients undergoing polysomnography. To determine whether the observed relationships readily translated to medical practice, we examined 2005-2009 data from the California Healthcare Cost and Utilization Project.

RESULTS: Among 4553 Health eHeart participants, the 526 with AF exhibited more frequent nighttime awakening (odd ratio [OR] 1.47; 95\% confidence interval [CI] 1.14-1.89; P = .003). In 5703 Cardiovascular Health Study participants followed for a median 11.6 years, frequent nighttime awakening predicted a 33\% greater risk of AF (hazard ratio [HR] 1.33; 95\% CI 1.17-1.51; P <.001). In patients with polysomnography (N = 1127), every standard deviation percentage decrease in rapid eye movement (REM) sleep was associated with a 18\% higher risk of developing AF (HR 1.18; 95\% CI 1.00-1.38; P = .047). Among 14,330,651 California residents followed for a median 3.9 years, an insomnia diagnosis predicted a 36\% increased risk of new AF (HR 1.36; 95\% CI 1.30-1.42; P <.001).

CONCLUSION: Sleep disruption consistently predicted AF before and after adjustment for OSA and other potential confounders across several different populations. Sleep quality itself may be important in the pathogenesis of AF, potentially representing a novel target for prevention.

}, issn = {1556-3871}, doi = {10.1016/j.hrthm.2018.05.008}, author = {Christensen, Matthew A and Dixit, Shalini and Dewland, Thomas A and Whitman, Isaac R and Nah, Gregory and Vittinghoff, Eric and Mukamal, Kenneth J and Redline, Susan and Robbins, John A and Newman, Anne B and Patel, Sanjay R and Magnani, Jared W and Psaty, Bruce M and Olgin, Jeffrey E and Pletcher, Mark J and Heckbert, Susan R and Marcus, Gregory M} } @article {8208, title = {Use of a pooled cohort to impute cardiovascular disease risk factors across the adult life course.}, journal = {Int J Epidemiol}, volume = {48}, year = {2019}, month = {2019 06 01}, pages = {1004-1013}, abstract = {

BACKGROUND: In designing prevention strategies, it may be useful to understand how early and midlife cardiovascular disease risk factor (CVDRF) exposures affect outcomes that primarily occur in mid to late life. Few single US cohorts have followed participants from early adulthood to late life.

METHODS: We pooled four prospective cohorts that represent segments of the adult life course, and studied 15~001 White and Black adults aged 18 to 95 years at enrollment. We imputed early and midlife exposure to body mass index (BMI), glucose, lipids and blood pressure (BP). CVDRF trajectories were estimated using linear mixed models. Using the best linear unbiased predictions, we obtained person-specific estimates of CVDRF trajectories beginning at age 20 until each participant{\textquoteright}s end of follow-up. We then calculated for each CVDRF, summary measures of early and midlife exposure as time-weighted averages (TWAs).

RESULTS: In the pooled cohort, 33.7\% were Black and 54.8\% were female. CVDRF summary measures worsened in midlife compared with early life and varied by sex and race. In particular, systolic and diastolic BP were consistently higher over the adult life course among men, and BMI was higher among Blacks, particularly Black women. Simulation studies suggested acceptable imputation accuracy, especially for the younger cohorts. Correlations of true and imputed CVDRF summary measures ranged from 0.53 to 0.99, and agreement ranged from 67\% to 99\%.

CONCLUSIONS: These results suggest that imputed CVDRFs may be accurate enough to be useful in assessing the effects of early and midlife exposures on later life outcomes.

}, issn = {1464-3685}, doi = {10.1093/ije/dyy264}, author = {Zeki Al Hazzouri, Adina and Vittinghoff, Eric and Zhang, Yiyi and Pletcher, Mark J and Moran, Andrew E and Bibbins-Domingo, Kirsten and Golden, Sherita H and Yaffe, Kristine} } @article {8703, title = {Association of Midlife Cardiovascular Risk Factors With the Risk of Heart Failure Subtypes Later in Life.}, journal = {J Card Fail}, volume = {27}, year = {2021}, month = {2021 Apr}, pages = {435-444}, abstract = {

BACKGROUND: Independent associations between cardiovascular risk factor exposures during midlife and later life development of heart failure (HF) with preserved ejection fraction (HFpEF) versus reduced EF (HFrEF) have not been previously studied.

METHODS: We pooled data from 4 US cohort studies (Atherosclerosis Risk in Communities, Cardiovascular Health, Health , Aging and Body Composition, and Multi-Ethnic Study of Atherosclerosis) and imputed annual risk factor trajectories for body mass index, systolic and diastolic blood pressure, low-density lipoprotein and high-density lipoprotein cholesterol, and glucose starting from age 40 years. Time-weighted average exposures to each risk factor during midlife and later life were calculated and analyzed for associations with the development of HFpEF or HFrEF.

RESULTS: A total of 23,861 participants were included (mean age at first in-person visit, 61.8 {\textpm}1 0.2 years; 56.6\% female). During a median follow-up of 12 years, there were 3666 incident HF events, of which 51\% had EF measured, including 934 with HFpEF and 739 with HFrEF. A high midlife systolic blood pressure and low midlife high-density lipoprotein cholesterol were associated with HFrEF, and a high midlife body mass index, systolic blood pressure, pulse pressure, and glucose were associated with HFpEF. After adjusting for later life exposures, only midlife pulse pressure remained independently associated with HFpEF.

CONCLUSIONS: Midlife exposure to cardiovascular risk factors are differentially associated with HFrEF and HFpEF later in life. Having a higher pulse pressure during midlife is associated with a greater risk for HFpEF but not HFrEF, independent of later life exposures.

}, issn = {1532-8414}, doi = {10.1016/j.cardfail.2020.11.008}, author = {Cohen, Laura P and Vittinghoff, Eric and Pletcher, Mark J and Allen, Norrina B and Shah, Sanjiv J and Wilkins, John T and Chang, Patricia P and Ndumele, Chiadi E and Newman, Anne B and Ives, Diane and Maurer, Mathew S and Oelsner, Elizabeth C and Moran, Andrew E and Zhang, Yiyi} } @article {9000, title = {Associations of Body Mass Index and Waist Circumference in Young Adulthood with Later Life Incident Diabetes.}, journal = {J Clin Endocrinol Metab}, volume = {106}, year = {2021}, month = {2021 11 19}, pages = {e5011-e5020}, abstract = {

CONTEXT: The independent contribution of young adult exposure to overweight and obesity to later-life incident diabetes is not well studied.

OBJECTIVE: To assess the associations of exposures to elevated body mass index (BMI) and waist circumference (WC) in young adulthood (ages 18-39 years) with incident diabetes later in life (>=40 years).

DESIGN: Pooled data from 6 US prospective cohorts (Atherosclerosis Risk in Communities Study, Cardiovascular Risk Development in Young Adults Study, Cardiovascular Health Study, (4) Framingham Heart Study Offspring Cohort, (5) Health, Aging and Body Composition Study, and (6) Multi-Ethnic Study of Atherosclerosis.

SETTING: Population-based cohort studies.

PARTICIPANTS: 30 780 participants (56.1\% female, 69.8\% non-Hispanic white) without a diagnosis of diabetes by age 40.

INTERVENTIONS: We imputed BMI and WC trajectories from age 18 for every participant and estimated time-weighted average exposures to BMI or WC during young adulthood and later life.

MAIN OUTCOME MEASURE(S): Incident diabetes defined as fasting glucose >=126 mg/dL, nonfasting glucose >=200 mg/dL, or use of diabetes medications.

RESULTS: During a 9-year median follow-up, 4323 participants developed incident diabetes. Young adult BMI and WC were associated with later-life incident diabetes after controlling for later-life exposures [hazard ratios (HR) 1.99 for BMI >= 30 kg/m2 and 2.13 for WC > 88cm (women)/>102cm (men) compared to normal ranges]. Young adult homeostatic model of insulin resistance mediated 49\% and 44\% of the association between BMI and WC with later-life incident diabetes. High-density lipoproteins and triglycerides mediated a smaller proportion of these associations.

CONCLUSIONS: Elevated BMI and WC during young adulthood were independently associated with later-life incident diabetes. Insulin resistance may be a key mediator.

}, keywords = {Adolescent, Adult, Biomarkers, Body Mass Index, Diabetes Mellitus, Female, Follow-Up Studies, Humans, Male, Obesity, Overweight, Prognosis, Prospective Studies, Risk Factors, United States, Waist Circumference, Young Adult}, issn = {1945-7197}, doi = {10.1210/clinem/dgab551}, author = {Nair, Nandini and Vittinghoff, Eric and Pletcher, Mark J and Oelsner, Elizabeth C and Allen, Norrina B and Ndumele, Chiadi E and West, Nancy A and Strotmeyer, Elsa S and Mukamal, Kenneth J and Siscovick, David S and Biggs, Mary L and Laferr{\`e}re, Blandine and Moran, Andrew E and Zhang, Yiyi} }