ArticleAmerican journal of epidemiology2026
The Green Heart Project: objectives, design, and methods.
Article in American journal of epidemiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03670524 (Health, Environment and Action in Louisville), which is not on this map. Cited by 12 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Health, Environment and Action in Louisville (HEAL) Green Heart Louisville Project
Who cites it
12 citing papers in PubMed.
- Associations between volatile organic compound mixtures and allostatic load: Evidence from the Green Heart Louisville Project.Environmental research · 2026Article
- Increasing Urban Tree Canopy Associated With Reduced Mortality: A Longitudinal Analysis of Chicago Neighborhoods.GeoHealth · 2026Article
- Relations of residential greenness with immunity and inflammation.Environmental research · 2026Article
- A prospective observational pilot study assessing childhood asthma control in areas with increased urban environmental greenery.BMC pulmonary medicine · 2026Observational
- Harnessing phytochemicals for engineering health solutions.Human genomics · 2026Review
- An environmental vulnerability index framework supporting targeted public health interventions at the census tracts level.Journal of exposure science & environmental epidemiology · 2026Article
- From prescription to practice: improving patient access and adherence to nature-based clinical interventions.Frontiers in public health · 2026Review
- Associations of sympathetic activation with exposure to volatile organic compounds: A cross-sectional study.Environmental research · 2025Article
- Perceived Benefits of Nature in Diverse Populations.International journal of environmental research and public health · 2025Article
- Environmental Hypertensionology and the Mosaic Theory of Hypertension.Hypertension (Dallas, Tex. : 1979) · 2025Review
- Greenness and pollution exposure predict corticosterone concentration in an urban songbird.Frontiers in physiology · 2025Article
- Intra-neighborhood associations between residential greenness and blood pressure.The Science of the total environment · 2024Article
Corrections and comments
- Update of
Authors and funding
14 authors.
Funding
Abstract
The Green Heart Project is a controlled, community-based clinical trial to evaluate the effects of increasing greenery on community health. The study was initiated in 2018 in a low- to middle-income residential area of nearly 30 000 racially diverse residents in Louisville, KY. Community engagement was maintained throughout the project, with feedback integrated into its design and implementation. Based on land use, demographics, and greenness in the area, we designated 8 paired clusters of demographically and environmentally matched target (T) and adjacent control (C) areas (total of 16 clusters). Levels of ultrafine particles, ozone, and nitrogen oxides were measured in each cluster. In-person exams were conducted for 735 participants in wave 1 (2018-2019) and 545 participants in wave 2 (2021). Blood, urine, nail, and hair samples were collected to evaluate cardiovascular risk, inflammation, stress, and pollutant exposure. Demographic and psychosocial data were collected as well. Cardiovascular function was assessed by measuring arterial stiffness and flow-mediated dilation. After wave 2, more than 8000 mature, mostly evergreen, trees and shrubs were planted in the T clusters. After planting, data were collected during wave 3 (2022) from 561 participants. We plan to follow changes in area characteristics and participant health to evaluate the long-term impact of the greening intervention. Trial registration: ClinicalTrials.gov. Identifier: NCT03670524.
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What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.