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Trajectories of Blood Lipid Concentrations Over the Adult Life Course and Risk of Cardiovascular Disease and All-Cause Mortality: Observations From the Framingham Study Over 35 Years.

ABSTRACT: Background Elevated total cholesterol ( TC ), low-density lipoprotein cholesterol ( LDL -C), triglycerides, and non-high-density lipoprotein cholesterol (non- HDL -C) and low high-density lipoprotein cholesterol ( HDL -C) concentrations correlate with atherosclerotic cardiovascular disease ( ASCVD ) and mortality. Therefore, understanding how lipid trajectories throughout adulthood impact ASCVD and mortality risk is essential. Methods and Results We investigated 3875 Framingham Offspring participants (54% women, mean age 48 years) attending ?1 examination between 1979 and 2014. We evaluated longitudinal correlates of each lipid subtype using mixed-effects models. Next, we clustered individuals into trajectories through group-based modeling. Thereafter, we assessed the prospective association of lipid trajectories with ASCVD and mortality. Male sex, greater body mass index, and smoking correlated with higher TC , LDL -C, triglycerides, non- HDL -C, and lower HDL -C concentrations. We identified 5 TC , HDL -C, and LDL -C trajectories, and 4 triglycerides and non- HDL -C trajectories. Upon follow-up (median 8.2 years; 199 ASCVD events; 256 deaths), elevated TC (>240 mg/ dL ), LDL -C (>155 mg/ dL ), or non- HDL -C (>180 mg/ dL ) concentrations conferred >2.25-fold ASCVD and mortality risk compared with concentrations <165 mg/ dL , <90 mg/ dL , and <115 mg/ dL , respectively ([ TC hazard ratio ( HR )_ASCVD=4.17, 95% CI 1.94-8.99; TC HR _death=2.47, 95% CI 1.28-4.76] [ LDL -C HR_ASCVD=5.09, 95% CI 1.54-16.85; LDL -C HR _death=4.04, 95% CI 1.84-8.89] [non- HDL -C HR_ASCVD=4.60, 95% CI 1.98-10.70; LDL -C HR _death=3.74, 95% CI 2.03-6.88]). Consistent HDL -C concentrations <40 mg/ dL were associated with greater ASCVD and mortality risk than concentrations >70 mg/ dL (HR_ASCVD=3.81, 95% CI 2.04-7.15; HR _death=2.88, 95% CI 1.70-4.89). Triglycerides trajectories were unassociated with outcomes. Conclusions Using a longitudinal modeling technique, we demonstrated that unfavorable lipid trajectories over 35 years confer higher ASCVD and mortality risk later in life.

SUBMITTER: Duncan MS

PROVIDER: S-EPMC6585376 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Project description:Background and aimsAlcohol consumption changes markedly over the life course, with important implications for health and social development. Assessment of these patterns often relies on cross-sectional data, which cannot fully capture how individuals' drinking changes as they age. This study used data from 18 waves of a general population panel survey to measure drinking trajectories over the life course in Australia.Design and settingLongitudinal survey data from the Household, Income and Labour Dynamics in Australia (HILDA) survey between 2001 and 2018.ParticipantsA total of 20 593 individuals ages 15 or above in two samples assessing quantity-frequency (n = 20 569, 52.0% female) and risky single occasion drinking (RSOD), respectively, (n = 17 340, 52.5% female), interviewed as part of HILDA.MeasurementsUsual quantity of alcohol consumed per drinking occasion; frequency of drinking occasions per week; average daily consumption, calculated by combining reported usual quantity and frequency; and average reported frequency of RSOD per week.FindingsMultilevel, mixed effects models run with fractional polynomial terms found similar male and female alcohol consumption trajectories for quantity-frequency and RSOD measures. Usual quantity of alcohol consumed per drinking occasion (5.4 drinks for men, 3.8 for women) and RSOD frequency (0.56 occasions/week for men, 0.38 for women) peaked in young adulthood, whereas frequency of drinking occasions (2.5 occasions/week for men, 1.7 for women) peaked in middle age. Middle-age drinkers had the highest average daily consumption of alcohol (1.4 drinks/day for 54-year-old men, 0.6 drinks for 57-year-old women) and engaged in RSOD slightly less than young adults.ConclusionsAlcohol consumption in Australia appears to vary substantially over the life course, with usual quantity per drinking occasion and frequency of risky single occasion drinking peaking during early adulthood and average daily consumption and frequency of consumption peaking in middle age.

Project description:ImportanceIf we assume that women and men exhibit variations of the same fundamental vascular physiology, then conventional analyses of subclinical measures would suggest that women catch up to men by midlife in the extent of potentially important vascular disease. Alternatively, under the assumption that vascular physiology may fundamentally differ between women and men, a sex-specific analysis of existing data could offer new insights and augment our understanding of sex differences in cardiovascular diseases.ObjectiveTo evaluate whether longitudinal patterns of blood pressure (BP) elevation differ between women and men during the life course when considering baseline BP levels as the reference.Design, setting, and participantsWe conducted sex-specific analyses of longitudinal BP measures (144 599 observations) collected for a period of 43 years (1971 to 2014) in 4 community-based US cohort studies. The combined total included 32 833 participants (54% female) spanning ages 5 to 98 years. Data were analyzed between May 4, 2019, and August 5, 2019.ExposuresAge and serially assessed longitudinal BP measures: systolic BP, diastolic BP, mean arterial pressure (MAP), and pulse pressure (PP).Main outcomes and measuresSex-specific change in each primary BP measure compared with baseline BP levels, derived from multilevel longitudinal models fitted over the age span, and new-onset cardiovascular disease events.ResultsOf the 32 833 participants, 17 733 were women (54%). Women compared with men exhibited a steeper increase in BP that began as early as in the third decade and continued through the life course (likelihood ratio test χ2 = 531 for systolic BP; χ2 = 123 for diastolic BP; χ2 = 325 for MAP; and χ2 = 572 for PP; P for all <.001). After adjustment for multiple cardiovascular disease risk factors, these between-sex differences in all BP trajectories persisted (likelihood ratio test χ2 = 314 for systolic BP; χ2 = 31 for diastolic BP; χ2 = 129 for MAP; and χ2 = 485 for PP; P for all <.001).Conclusions and relevanceIn contrast with the notion that important vascular disease processes in women lag behind men by 10 to 20 years, sex-specific analyses indicate that BP measures actually progress more rapidly in women than in men, beginning early in life. This early-onset sexual dimorphism may set the stage for later-life cardiovascular diseases that tend to present differently, not simply later, in women compared with men.

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Trajectories of Blood Lipid Concentrations Over the Adult Life Course and Risk of Cardiovascular Disease and All-Cause Mortality: Observations From the Framingham Study Over 35 Years.

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