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Long- and short-term air pollution exposure and measures of arterial stiffness in the Framingham Heart Study.

ABSTRACT: BACKGROUND:Studies of air pollution exposure and arterial stiffness have reported inconsistent results and large studies employing the reference standard of arterial stiffness, carotid-femoral pulse-wave velocity (CFPWV), have not been conducted. AIM:To study long-term exposure to ambient fine particles (PM2.5), proximity to roadway, and short-term air pollution exposures in relation to multiple measures of arterial stiffness in the Framingham Heart Study. METHODS:We assessed central arterial stiffness using CFPWV, forward pressure wave amplitude, mean arterial pressure and augmentation index. We investigated long-and short-term air pollution exposure associations with arterial stiffness with linear regressions using long-term residential PM2.5 (2003 average from a spatiotemporal model using satellite data) and proximity to roadway in addition to short-term averages of PM2.5, black carbon, particle number, sulfate, nitrogen oxides, and ozone from stationary monitors. RESULTS:We examined 5842 participants (mean age 51?±?16, 54% women). Living closer to a major roadway was associated with higher arterial stiffness (0.11?m/s higher CFPWV [95% CI: 0.01, 0.22] living <50?m vs 400???1000?m). We did not observe association between arterial stiffness measures and long-term PM2.5 or short-term levels of PM2.5, particle number, sulfate or ozone. Higher levels of black carbon and nitrogen oxides in the previous days were unexpectedly associated with lower arterial stiffness. CONCLUSIONS:Long-term exposure to PM2.5 was not associated with arterial stiffness but positive associations with living close to a major road may suggest that pollutant mixtures very nearby major roads, rather than PM2.5, may affect arterial stiffness. Furthermore, short-term air pollution exposures were not associated with higher arterial stiffness.

SUBMITTER: Ljungman PLS

PROVIDER: S-EPMC6221919 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

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Long- and short-term air pollution exposure and measures of arterial stiffness in the Framingham Heart Study.

Ljungman Petter L S PLS Li Wenyuan W Rice Mary B MB Wilker Elissa H EH Schwartz Joel J Gold Diane R DR Koutrakis Petros P Benjamin Emelia J EJ Vasan Ramachandran S RS Mitchell Gary F GF Hamburg Naomi M NM Mittleman Murray A MA

Environment international 20180908 Pt 1

<h4>Background</h4>Studies of air pollution exposure and arterial stiffness have reported inconsistent results and large studies employing the reference standard of arterial stiffness, carotid-femoral pulse-wave velocity (CFPWV), have not been conducted.<h4>Aim</h4>To study long-term exposure to ambient fine particles (PM<sub>2.5</sub>), proximity to roadway, and short-term air pollution exposures in relation to multiple measures of arterial stiffness in the Framingham Heart Study.<h4>Methods</h ...[more]

PMID: 30205320

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Project description:BackgroundArterial stiffness increases with age and is associated with an increased risk of adverse outcomes on short-term follow-up (typically <10 years). Data regarding associations of arterial stiffness with health outcomes on longer-term follow-up are lacking.MethodsWe evaluated 7283 Framingham Study participants (mean age 50 years, 53% women) who underwent assessment of carotid-femoral pulse wave velocity (a marker of arterial stiffness) via applanation tonometry at one or more routine examinations. We used time-dependent Cox proportional hazards regression models to relate carotid-femoral pulse wave velocity to the incidence of health outcomes (updating carotid-femoral pulse wave velocity and all covariates at serial examinations).ResultsOn long-term follow-up (median 15 years; minimum-maximum, 0-20), participants developed cardiometabolic disease (hypertension [1255 events]; diabetes [381 events]), chronic kidney disease (529 events), dementia (235 events), cardiovascular disease (684 events) and its components (coronary heart disease [314 events], heart failure [191 events], transient ischemic attacks or stroke [250 events]), and death (1086 events). In multivariable-adjusted models, each SD increment in carotid-femoral pulse wave velocity was associated with increased risk of hypertension (hazard ratio [HR], 1.32 [95% CI, 1.21-1.44]), diabetes (HR, 1.32 [95% CI, 1.11-1.58]), chronic kidney disease (1.19 [95% CI, 1.05-1.34]), dementia (HR 1.27 [95% CI, 1.06-1.53]), cardiovascular disease (HR, 1.20 [95% CI, 1.06-1.36]) and its components (coronary heart disease, HR 1.37 [95% CI, 1.13-1.65]; transient ischemic attack/stroke, HR, 1.24 [95% CI, 1.00-1.53]), and death (HR, 1.29 [95% CI, 1.17-1.43]). The association with heart failure was borderline nonsignificant (HR, 1.21 [95% CI, 0.98-1.51], P=0.08).ConclusionsOur prospective observations of a large community-based sample establish the long-term prognostic importance of arterial stiffness for multiple health outcomes.

Dataset Information

Long- and short-term air pollution exposure and measures of arterial stiffness in the Framingham Heart Study.

Publications

Long- and short-term air pollution exposure and measures of arterial stiffness in the Framingham Heart Study.

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