Dataset Information

Inequalities in urban greenness and epigenetic aging: Different associations by race and neighborhood socioeconomic status.

ABSTRACT: Slower epigenetic aging is associated with exposure to green space (greenness); however, the longitudinal relationship has not been well studied, particularly in minority groups. We investigated the association between 20-year exposure to greenness [Normalized Difference Vegetation Index (NDVI)] and epigenetic aging in a large, biracial (Black/white), U.S. urban cohort. Using generalized estimating equations adjusted for individual and neighborhood socioeconomic characteristics, greater greenness was associated with slower epigenetic aging. Black participants had less surrounding greenness and an attenuated association between greenness and epigenetic aging [β_NDVI5km: -0.80, 95% confidence interval (CI): -4.75, 3.13 versus β_NDVI5km: -3.03, 95% CI: -5.63, -0.43 in white participants]. Participants in disadvantaged neighborhoods showed a stronger association between greenness and epigenetic aging (β_NDVI5km: -3.36, 95% CI: -6.65, -0.08 versus β_NDVI5km: -1.57, 95% CI: -4.12, 0.96 in less disadvantaged). In conclusion, we found a relationship between greenness and slower epigenetic aging, and different associations by social determinants of health such as race and neighborhood socioeconomic status.

SUBMITTER: Kim K

PROVIDER: S-EPMC10306284 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature

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Inequalities in urban greenness and epigenetic aging: Different associations by race and neighborhood socioeconomic status.

Kim Kyeezu K Joyce Brian T BT Nannini Drew R DR Zheng Yinan Y Gordon-Larsen Penny P Shikany James M JM Lloyd-Jones Donald M DM Hu Ming M Nieuwenhuijsen Mark J MJ Vaughan Douglas E DE Zhang Kai K Hou Lifang L

Science advances 20230628 26

Slower epigenetic aging is associated with exposure to green space (greenness); however, the longitudinal relationship has not been well studied, particularly in minority groups. We investigated the association between 20-year exposure to greenness [Normalized Difference Vegetation Index (NDVI)] and epigenetic aging in a large, biracial (Black/white), U.S. urban cohort. Using generalized estimating equations adjusted for individual and neighborhood socioeconomic characteristics, greater greennes ...[more]

PMID: 37379393

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Project description:BackgroundNeighborhood deprivation is linked with inflammation, which may explain poorer health across populations. Behavioral risk factors are assumed to largely mediate these relationships, but few studies have examined this. We examined three neighborhood contextual factors that could exert direct effects on inflammation: (1) neighborhood socioeconomic status, (2) an index of concentration at extremes (that measures segregation), and (3) surrounding vegetation (greenness).MethodsUsing blood samples and addresses collected from prospective cohorts of 7,930 male (1990-1994) and 16,183 female (1986-1990) health professionals with at least one inflammatory marker, we prospectively linked neighborhood contextual factors to inflammatory biomarkers (adiponectin, C-reactive protein, interleukin-6, soluble tumor necrosis factor receptor-2). Log-transformed, z-scaled component measures were used to calculate an inflammation score. Neighborhood socioeconomic status and index of concentration of extremes were obtained from the 1990 decennial census and linked to participant addresses. Surrounding greenness was assessed from satellite data and focal statistics were applied to generate exposures within 270 m and 1230 m of the participants' address. We fit multiple linear regression models adjusting for demographic, clinical, and behavioral risk factors.ResultsHigher neighborhood socioeconomic status was associated with lower inflammation score in women (β for interquartile range increase = -27.7%, 95% CI: -34.9%, -19.8%) and men (β = -21.2%, 95% CI: -31.0%, -10.1%). Similarly, participants in neighborhoods with higher concentrations of high-income households were associated with lower inflammation score in women (β = -27.8%, 95% CI: -35.8%, -18.7%) and men (β = -16.4%, 95% CI: -29.7%, -0.56%). Surrounding greenness within 270 m of each participant's address was associated with lower inflammation score in women (β = -18.9%, 95% CI: -28.9%, -7.4%) but not men. Results were robust to sensitivity analyses to assess unmeasured confounding and selection bias.DiscussionOur findings support the hypothesis that adverse neighborhood environments may contribute to inflammation through pathways independent of behavioral risk factors, including psychosocial stress and toxic environments.

Project description:BackgroundIn the United States, due to residential segregation, racial minorities and families with low socioeconomic status (SES) tend to live in less safe neighborhoods than their White and high SES counterparts. As such, in the US, race and SES closely correlate with neighborhood safety. Due to the high chronicity of stress in unsafe neighborhoods, perceived neighborhood safety may be a mechanism through which race and SES are linked to children's mental health. Simultaneously, race and SES may alter the effects of perceived neighborhood safety on children's mental health.AimTo explore racial and SES differences in the effects of neighborhood safety on children's internalizing symptoms, we compared racially and SES diverse groups of American children for the effects of parents' perceived neighborhood safety on children's internalizing symptoms.MethodsThis cross-sectional study included 10484 children from the Adolescent Brain Cognitive Development (ABCD) study. Mixed-effects regression was used for data analysis. The predictor variable was parents' perceived neighborhood safety which was treated as a continuous measure. The primary outcome was children's internalizing symptoms reported by children. Race, parental education, household income, and family structure were moderators.ResultsOverall, the parents' high neighborhood safety was associated with lower levels of internalizing symptoms in children. Race and household income showed statistically significant interactions with subjective neighborhood safety on children's internalizing symptoms. Parents' perceived neighborhood safety showed a stronger inverse association with children's internalizing symptoms for Black than White families. Parents' perceived neighborhood safety showed a stronger inverse association with children's internalizing symptoms for high income than low-income families. Parental education or family structure did not show any significant interaction with parents' perceived neighborhood safety on children's internalizing symptoms.ConclusionThe degree to which neighborhood safety may be associated with children's internalizing symptoms may depend on race and household income. Some of the effects of race and SES on children's mental health outcomes may be due to interactions with contextual factors such as neighborhood safety. More research is needed on why and how diverse racial and SES groups differ in the association between perceived neighborhood safety and children's well-being.

Project description:Objective Urban neighborhood greenness is associated with greater cardiovascular health in the general population, and with better pregnancy and neonatal outcomes. Hypertension in pregnancy is a leading cause of maternal mortality and long-term cardiovascular morbidity and mortality in women. We sought to examine the association between greenness and hypertensive disorders of pregnancy.Study design This study is a secondary analysis of a prospective cohort study of 1,943 women who received prenatal care from December 2013 to December 2016 at a single, urban, and tertiary academic medical center in Philadelphia, PA. Greenness measure was quantified via residential tree canopy cover within circumferential buffers of 100- and 500-meter radii around participants' homes. Associations between greenness and hypertensive disorders of pregnancy (defined as gestational hypertension or preeclampsia) were estimated by using multilevel logistic regression accounting for maternal sociodemographic information (race-ethnicity, insurance status, and age) medical history (diabetes, body mass index, smoking history, and parity), neighborhood deprivation index, and including 1,225 Philadelphia residents for whom key exposure and outcome data were available.Results At baseline, the participants' mean (SD) age was 27.5 (5.9) years, (range: 14-44 years). The majority of participants were non-Hispanic Black (857, 70.2%). Participants with less residential tree canopy cover were significantly more likely to have hypertensive disorders of pregnancy. The multivariable-adjusted odds ratio of hypertensive disorders of pregnancy among participants with less than 10% compared with those with greater than 30% tree canopy cover was 2.14 (95% confidence interval [CI]: 1.11-4.15) within 100-meter buffer.Conclusion In our cohort, greenness was associated with lower hypertensive disorders of pregnancy odds. Our findings add to evidence that greenness may confer health benefits and warrant further investigations in identifying whether there is a causal pathway through which greenness may be protective against hypertensive disorders of pregnancy.Key points· Low residential tree canopy is associated with increased risk of hypertensive disorders of pregnancy. · 100-meter buffers are most sensitive in identifying associations between tree canopy and HDP risk. · The role of greenness against hypertensive disorders of pregnancy should be further studied experimentally.

Dataset Information

Inequalities in urban greenness and epigenetic aging: Different associations by race and neighborhood socioeconomic status.

Publications

Inequalities in urban greenness and epigenetic aging: Different associations by race and neighborhood socioeconomic status.

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