ClinicalTrials.gg
CompletedNCT02841566GAMMAUpdated Jun 24, 2026

Comparative Study of the Link Between the Practice of Gambling and Money and Materialism Among Problem Gamblers and Non-problem Gamblers

An observational study in Gambling, sponsored by Nantes University Hospital. Completed at 1 site in France. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-06-24.

Sponsored by Nantes University Hospital · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
144
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to to explore the link between materialism and addiction to gambling and money

02

Conditions studied

  • Gambling

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03

In context

Gambling

158 studies on the registry are indexed under Gambling; 42 are open to participants now.

This study's enrollment of 144 is below the median of 213 across 23 observational studies indexed under Gambling.

Browse Gambling studies →

Lead sponsor

Nantes University Hospital is the lead sponsor of 839 studies on the registry; 195 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

All new patients be seen by a doctor for a behavioral addiction in the addictology and psychiatric department

Eligibility criteria

Inclusion Criteria: ( specific to problem gamblers)

  • subject having at least four diagnostic criteria in "Trouble linked to gambling and money" (APA 2013)
  • subject who had written consent for participation in the EVALADD cohort
  • Subject who has started treatment for a problem with the practice of gambling and money in the addictology and psychiatric department

( specific to non-problem gamblers)

  • Subject playing games of chance and money at least once a year
  • Subject playing games of chance and money less than once per week OR less than € 500 per year
  • Subject having a score of 0-2 at ICJE questionnaire

Exclusion Criteria:

  • Subject having difficulty reading or writing of the French language
  • Subject having Parkinson's Disease
  • Subject under guardianship
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

DSM diagnostic criteria

The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
144 participants (actual)
Target follow-up
1 Day
Patient registry
Yes

Groups and cohorts

  • Problem glambers

    The group of problem gamblers will consist of patients already included in the cohort EVALADD \[favorable opinion of GNEDS 06/09/2012; CNIL authorization No. 912631 of 10.09.2013\], and the data will be extracted directly from the database EVALADD

    Other: questionnaire

  • Non-problem gamblers

    The subjects of this group will be matched on sex, age and education level with the group problem gamblers. They will be recruited over the Internet and using the volunteer base \[normal declaration with the CNIL: No. 1761543 of 21/05/2014\].

    Other: questionnaire

Interventions

  • Otherquestionnaire
06

What researchers measure

Primary outcomes

  1. Materialism level among problem gamblers compared to non-problem gamblers

    To assess the total score of materialism by the Material Value Scale in 15 items (MVS-15), among a group of non-problem gamblers and a group of problem gamblers.

    Time frame: 1 year

07

Study locations

1 site
  • CHU de Nantes
    Nantes, 44093, France
08

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Oct 2015, a primary completion of Apr 2016 and a completion of Apr 2016. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 19, 2016
First posted
Jul 22, 2016
Start
Oct 2015
Primary completionActual
Apr 2016
CompletionActual
Apr 2016
Last update
Jun 24, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 24, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02841566
Responsible party
Sponsor
First posted
Jul 22, 2016
Start date
Oct 2015
Primary completion
Apr 2016
Completion
Apr 2016
Last update
Jun 24, 2026

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2016. You cannot join it, but the record below documents what was studied.

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Discussion

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