NCT03389828

Brief Summary

Background: Sleep that does not last long and is low-quality is tied to a range of serious health issues. These range from obesity to early death. Research has shown that black people who are professionals or managers are more likely to have this kind of sleep than their white counterparts. Black people are also at higher risk than whites for health problems caused by insufficient sleep. Researchers want to learn more about why these differences exist. Objective: To study reasons for racial differences in the work-sleep relationship. Eligibility: Adults at least 25 years old who:

  • Are non-Hispanic black or non-Hispanic white
  • Are employed and work 38 or more hours a week
  • Live around Raleigh-Durham-Chapel Hill, NC, or Washington, DC Design: Participants will be screened with questions. They will give sociodemographic data like job title, annual income level, and gender. They will give their contact information. Participants will have 1 study visit. They will be in a closed, private conference room. They will join a focus group. The focus groups will be organized by to race, gender, and occupational class. Participants will give informed consent before the focus group begins. During the focus group, participants will be asked about their perceptions of health in general, and their typical work day. They will be asked about sleep. Participants will also fill out a short questionnaire about their job and sleep habits. Focus groups will be audio recorded. The entire session will last 90 to 120 minutes.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
263

participants targeted

Target at P75+ for all trials

Timeline
Completed

Started May 2018

Typical duration for all trials

Geographic Reach
1 country

2 active sites

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

January 3, 2018

Completed
1 day until next milestone

First Posted

Study publicly available on registry

January 4, 2018

Completed
4 months until next milestone

Study Start

First participant enrolled

May 8, 2018

Completed
2.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

September 28, 2020

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

September 28, 2020

Completed
Last Updated

April 29, 2026

Status Verified

February 23, 2026

Enrollment Period

2.4 years

First QC Date

January 3, 2018

Last Update Submit

April 28, 2026

Conditions

Sleep Health

Keywords

Focus GroupHealth DisparitiesOccupational HealthBehaviorsNatural History

Outcome Measures

Primary Outcomes (1)

  • Outcome measures include the themes/patterns regarding potential system-level influences, beliefs, and behaviors that may explain racial differences in the association between occupational class and sleep health.

    Data will be analyzed via qualitative coding software to identify themes/patterns in the narratives of participants in focus groups and interviews.

    At the time of the focus group and in more detail during data analysis (coding)

Study Arms (1)

1

The study population will consist of approximately 340 focus groups participants.

Eligibility Criteria

Age25 Years+
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Community sample - residents from Durham, NC and the surrounding areas as well as residents from Silver Spring, MD and the surrounding areas.

You may qualify if:

  • Non-Hispanic Black or non-Hispanic White
  • Female or Male
  • years of age or older
  • Employed (38 plus hours/week)
  • Residing in the area around Raleigh-Durham-Chapel Hill, NC or Silver Spring, MD

You may not qualify if:

  • Born outside the continental United States
  • Not fluent in English
  • Unwilling to provide answers to all screening questions
  • Unwilling to provide informed consent

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (2)

Social and Scientific Systems, Inc.

Silver Spring, Maryland, 20910, United States

Location

Social and Scientific Systems, Inc.

Durham, North Carolina, 27703, United States

Location

Related Publications (3)

  • Jackson CL, Redline S, Kawachi I, Williams MA, Hu FB. Racial disparities in short sleep duration by occupation and industry. Am J Epidemiol. 2013 Nov 1;178(9):1442-51. doi: 10.1093/aje/kwt159. Epub 2013 Sep 9.

    PMID: 24018914BACKGROUND

  • Luckhaupt SE, Tak S, Calvert GM. The prevalence of short sleep duration by industry and occupation in the National Health Interview Survey. Sleep. 2010 Feb;33(2):149-59. doi: 10.1093/sleep/33.2.149.

    PMID: 20175398BACKGROUND

  • Krueger PM, Friedman EM. Sleep duration in the United States: a cross-sectional population-based study. Am J Epidemiol. 2009 May 1;169(9):1052-63. doi: 10.1093/aje/kwp023. Epub 2009 Mar 18.

    PMID: 19299406BACKGROUND

MeSH Terms

Conditions

Behavior

Study Officials

  • Chandra L Jackson, Ph.D.

    National Institute of Environmental Health Sciences (NIEHS)

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
observational
Observational Model
OTHER
Time Perspective
CROSS SECTIONAL
Sponsor Type
NIH
Responsible Party
SPONSOR

Study Record Dates

First Submitted

January 3, 2018

First Posted

January 4, 2018

Study Start

May 8, 2018

Primary Completion

September 28, 2020

Study Completion

September 28, 2020

Last Updated

April 29, 2026

Record last verified: 2026-02-23

Locations

US(2)