UrbanHEAT: Health Behaviors, Outcomes, and Disparities in Individually Experienced Temperature Across an Urban Community

July 29, 2025 updated by: National Institutes of Health Clinical Center (CC)

UrbanHEAT: Pilot of Prospective Observational Study of Health Behaviors, Outcomes, and Disparities in Individually Experienced Temperature Across an Urban Community

We are conducting a research study to learn about how individuals living in Washington, DC perceive and experience temperature.

Participation in this study will include:

2 remote visits over the phone and/or computer (these will each last about1.5 to 2 hours)

  • During the remote visits, you will be asked to respond to a series of surveys, so that we can learn about your life, behaviors, and health

    2 weeks of data collection where you will be asked to:

  • Wear monitoring devices

    • These will collect information on your location and physical activity
    • We will ask you to wear the monitors on a belt around your waist all day every day during these 2 weeks of data collection.
    • All of the monitors will be sent to you in the mail.
  • Leave a temperature tracker near where you sleep to measure the temperature of your environment.

  • Use a phone app

    • We will also send you questions through the phone app that will ask about your stress level, sleep duration, sleep quality, and how you feel about the current temperature.

Risks of participating in this study are minimal. They include the inconvenience of wearing the monitors and the possibility of a breach of your confidentiality. We are collecting personal information about you and the location monitor will collect information about where you spend your time. We will take every precaution in order to safeguard the data that you provide, including limiting who has access to it, storing it safely, and removing the capacity to identify you individually, as much as possible.

You will receive no immediate benefits from participating in this study. We hope what we learn will help us to develop policies and programs to help keep urban populations safe during increasingly warm summer temperatures.

You are eligible for this study if you are 18 years of age or older, live in Washington, DC, can read and write in English, and have access to a smartphone that you can use for the 2 week data collection period....

Study Overview

Status

Withdrawn

Conditions

Detailed Description

Study Description:

This pilot study will test measures for cardiometabolic behaviors and outcomes (e.g., physical activity, sedentary behavior, stress, sleep quality, sleep quantity) and individually experienced temperature with intensive longitudinal data collected via wearable devices and smart phone-based ecological momentary assessment. The primary hypothesis is that there are associations between individually experienced temperature and the identified behaviors and outcomes.

Objectives:

Primary:

To explore within and between-person associations between individually experienced temperature and cardiometabolic risk behaviors and outcomes.

Secondary:

Aim 1: Explore disparities in individually experienced temperature based on race, ethnicity, socioeconomic factors, sex, and age.

Aim 2: Explore multilevel determinants of individually experienced temperature: neighborhood environment (residential and activity space), home, workplace, and preferences

Endpoints:

Primary:

  • Physical Activity
  • Sedentary behavior
  • Stress/mental well-being
  • Sleep quantity
  • Sleep quality

Secondary:

  • Daily mean individually experienced temperature
  • Daily maximum individually experienced temperature
  • Daily degree minutes above threshold
  • Longest daily exposure period

Study Type

Observational

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Maryland
      • Bethesda, Maryland, United States, 20892-5465
        • National Institute on Minority Health and Health Disparities

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adults 18 and over with home addresses located within Washington, DC.

Description

  • INCLUSION CRITERIA:

In order to be eligible to participate in this study, an individual must meet all of the following criteria:

  • Stated willingness to comply with all study procedures and availability for the duration of the study.
  • Ability of subject to understand and the willingness to sign a written informed consent document.
  • Aged at least 18 years.
  • Ability to read and write in English. This is justified by the novelty of the survey instruments (e.g., momentary thermal comfort conducted in an ecological momentary assessment context).
  • Home address in Washington, DC
  • Availability of a smart phone on which Metricwire Ecological Momentary Assessment software can be downloaded and used during the 14-day data collection period.

EXCLUSION CRITERIA:

An individual who meets any of the following criteria will be excluded from participation in this study:

  • Requirement of hospitalization at enrollment.
  • Inability to consent.
  • Unwillingness to comply with study procedures.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Healthy Volunteers
Healthy Volunteers with home address in Washington, DC.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Physical Activity
Time Frame: 2 weeks
Daily/Weekly Minutes MVPA (Moderate to Vigorous Physical Activity) as measured via waist-worn acceleromter
2 weeks
Sedentary Behavior
Time Frame: 2 weeks
Daily/Weekly Minutes Sedentary Behavior as measured via waist-worn accelerometer
2 weeks
Stress/mental Well-being
Time Frame: 2 weeks
Momentary/Daily Mean/Weekly Mean score on ecological momentary assessment random prompt questions derived from PSS-4 stress survey
2 weeks
Sleep Quantity
Time Frame: 2 weeks
Daily/Weekly Mean Hours Sleep collected via daily ecological momentary assessment morning prompt
2 weeks
Sleep Quality
Time Frame: 2 weeks
Daily/Weekly Mean Score derived from PSQI sleep survey collected via daily ecological momentary assessment morning prompt
2 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Daily mean individually experienced temperature
Time Frame: 2 weeks
average of all daily minute-epoch individual environmental temperature measures collected via iButton Hygrochron aggregated to (1) 24-hour days, (2) daylight only days, and (3) nighttime only days
2 weeks
Daily maximum individually experienced temperature
Time Frame: 2 weeks
highest measured minute-epoch individual environmental temperature collected via iButton Hygrochron for (1) 24-hour days, (2) daylight only days, and (3) nighttime only days
2 weeks
Daily degree minutes above threshold
Time Frame: 2 weeks
minutesXdegrees exceeding test thresholds ranging from 80F-105F collected via iButton Hygrochron for (1) 24-hour days, (2) daylight only days, and (3) nighttime only days
2 weeks
Longest daily exposure period
Time Frame: 2 weeks
minutes of longest daily period exceeding test thresholds ranging from 80F-105F collected via iButton Hygrochron for (1) 24-hour days, (2) daylight only days, and (3) nighttime only days
2 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institutes of Health Clinical Center (CC)

Collaborators

National Institute of Nursing Research (NINR)
National Institute on Minority Health and Health Disparities (NIMHD)

Investigators

  • Principal Investigator: Kelly K Jones, National Institute on Minority Health and Health Disparities (NIMHD)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 22, 2025

Primary Completion (Actual)

July 29, 2025

Study Completion (Actual)

July 29, 2025

Study Registration Dates

First Submitted

January 15, 2025

First Submitted That Met QC Criteria

January 15, 2025

First Posted (Actual)

January 16, 2025

Study Record Updates

Last Update Posted (Actual)

July 31, 2025

Last Update Submitted That Met QC Criteria

July 29, 2025

Last Verified

July 1, 2025

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 10002097
  • 002097-MD

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Aggregated, non-identifiable data will be submitted to a data repository as required by policy.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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