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TerminatedNCT02651480Updated Sep 17, 2026

A Nutritional Intervention in Police Officers

An interventional study of Plant-based diet and Control Group in Overweight, Blood Pressure and Diabetes Mellitus, Type 2, sponsored by Physicians Committee for Responsible Medicine. Terminated at 1 site in United States. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2026-09-17.

Sponsored by Physicians Committee for Responsible Medicine · Not applicable, Interventional, and Supportive care

Why this study was terminated
Sponsor put plans on hold
Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Randomized
Ages
18 Years to 90 Years
Sex
All
01

Study summary

The proposed study seeks to test the effect of a plant-based dietary intervention on cardiovascular risk factors in police officers.

Read the detailed description

This study tests the hypotheses that a low-fat, plant-based (vegan) diet improves body weight, plasma lipid concentrations, blood pressure, and, in individuals with type 2 diabetes, glycemic control, that a low-fat, plant-based diet improves health-related quality of life as measured by the Medical Outcomes Study Short Form 36-Item Health Survey (SF-36), and that a low-fat, plant-based diet improves mood, as measured by the Center for Epidemiologic Studies Depression Scale-Revised (CESD-R).

02

Conditions studied

  • Overweight
  • Blood Pressure
  • Diabetes Mellitus, Type 2

Keywords

  • Diet, Vegetarian
  • Diet, Fat-Restricted
  • Quality of Life
  • Glycemic Index
03

In context

Overweight

3,670 studies on the registry are indexed under Overweight; 849 are open to participants now.

This study's planned enrollment of 20 is below the median of 73 across 3,175 interventional studies indexed under Overweight.

Browse Overweight studies →

Lead sponsor

Physicians Committee for Responsible Medicine is the lead sponsor of 32 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 90 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Men and women at least 18 years
  2. Body mass index ≥ 25 kg/m2 and/or a diagnosis of type 2 diabetes mellitus, as defined by a fasting plasma glucose concentration ≥ 126 mg/dl on two occasions or a prior physician's diagnosis of type 2 diabetes
  3. Currently an employee of the Metropolitan Police Department of the District of Columbia
  4. Ability and willingness to participate in all components of the study
  5. A willingness to be randomly assigned to either study group

Exclusion criteria

Exclusion Criteria:

  1. Alcohol consumption of more than 2 drinks per day or the equivalent, episodic increased drinking (e.g., more than 2 drinks per day on weekends), or a history of alcohol abuse or dependency followed by any current use
  2. Use of recreational drugs in the past 6 months (past drug use, if fully recovered, is not a criteria for exclusion)
  3. Pregnancy
  4. Unstable medical or psychiatric illness
  5. Likely to be disruptive in group sessions (as determined by research staff)
  6. Already following a low-fat, vegan diet
  7. Lack of English fluency
  8. Inability or unwillingness to participate in all components of the study
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Single (Care provider)
Enrollment
20 participants (estimated)

Study arms

  • Experimental
    Vegan Group

    Participants in the intervention group will follow a low-fat, plant-based diet for 14 weeks, and will attend nutrition classes in the form of a weekly support group.

    Dietary Supplement: Plant-based diet

  • Active comparator
    Control Group

    The control group will follow an unrestricted diet with no instruction.

    Dietary Supplement: Control Group

Interventions

  • Dietary supplementPlant-based diet

    Weekly instructions will be given to the participants in the intervention group about following vegan diet.

    Also known as: Vegan Group

  • Dietary supplementControl Group

    Unrestricted diet with no instruction.

    Also known as: Control

06

What researchers measure

Primary outcomes

  1. Body Weight

    body weight will be measured to the nearest 0.1 kg, using a digital scale.

    Time frame: Changes in body weight from Baseline at 14 weeks

  2. Plasma lipid concentrations

    will be measured using the Olympus Cholesterol Reagent on Olympus Chemistry Analyzers to assess changes in plasma lipid concentrations.

    Time frame: Changes in plasma lipid concentrations from Baseline at 14 weeks

  3. Blood pressure

    Blood pressure will be measured at each assessment

    Time frame: Changes in blood pressure from Baseline at 14 weeks

Secondary outcomes

  1. Quality of Life and Mood

    Measured by a Modified Health Assessment Questionnaire (MHAQ). The questionnaire measures the difficulty level of performing 8 different activities. A score of 0 = the activity can be performed without difficulty. A score of 3 = the activity cannot be performed. The MHAQ is calculated as the average of these scores.

    Time frame: Change in quality of life from Baseline at 4 months

07

Study locations

1 site
  • Physicians Committee for Responsible Medicine
    Washington D.C., District of Columbia 20016, United States
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 17, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02651480
Lead sponsor
Physicians Committee for Responsible Medicine
Collaborators
Metropolitan Police Department of Washington, D.C.
Responsible party
Sponsor
First posted
Jan 11, 2016
Start date
Feb 2016
Primary completion
Sep 2026
Completion
Sep 2026
Last update
Sep 17, 2026

Study contacts

Neal D Barnard, M.D.
principal investigator · President

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.

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