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

Withdrawn

• Conditions: Temperature

• Registration Number: NCT06778252
• Lead Sponsor: National Institutes of Health Clinical Center (CC)

Brief Summary

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....

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 Timeline

• Study First Submitted: 2025-01-15
• Study First Submitted QC: 2025-01-15
• Study First Posted: 2025-01-16
• Status Verified: 2025-07
• Study Start: 2025-07-22
• Primary Completion: 2025-07-29
• Study Completion: 2025-07-29
• Last Update Submitted: 2025-07-29
• Last Update Posted: 2025-07-31

Recruitment & Eligibility

• Status: WITHDRAWN
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

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

Secondary Outcome Measures

Name	Time	Method
Daily mean individually experienced temperature	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
Daily maximum individually experienced temperature	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
Daily degree minutes above threshold	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
Longest daily exposure period	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

Trial Locations

Locations (1)

National Institute on Minority Health and Health Disparities; 🇺🇸 Bethesda, Maryland, United States