ChemSex Users for YMSMCLYMAXNCT05559658
Comprehensive Assessment in a Longitudinal Study on Young Men Who Have Sex With Men Attracting to chemseX
An observational study of ChemSex Users for YMSM and ChemSex Users, run by Institute of HIV Research and Innovation Foundation, Thailand at 1 site in Thailand.
Trial summary
The study is a two-phase observational study that assess multiple aspects of study and young men who have sex with men (YMSM). Phase I of the study will be a cross-sectional descriptive study using a mixed methods data collection (focusing on qualitative data collection) to acquire information necessary for developing… Read more about this study
- Who is it for?
- Ages 16 to 35 years, men only
- Conditions the study is for
- ChemSex Users for YMSM, ChemSex Users
- How many people
- 60 participants
- Where
- 1 siteThailand
- Study dates
- 20 Feb 2023to 30 Mar 2026
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 16 to 35 years
- Men only
- Child, Adult
Study population: Current chemsex users
Who may be able to join
- Group 1A: Current chemsex users
- Men who have sex with men
- Aged 16-35 years
- Able to communicate in Thai fluently
- Current chemsex users
- Provide informed consent
Show all 12Show fewer
- Group 1B: Former chemsex users (discontinued ≥90 days)
- Men who have sex with men
- Aged 16-35 years
- Able to communicate in Thai fluently
- Former chemsex users (discontinued ≥90 days)
- Provide informed consent
Who cannot join
- No exclusion criteria for all groups of participants
Trial locations and contacts
1 site in 1 country.
Thailand1 site
Institute of HIV Research and Innovation
Pathum Wan, Bangkok, 10330
About this study
Official title: A Cross-sectional Descriptive Study Using Mixed Method (Qualitative and Quantitative) Data Collection
The study is a two-phase observational study that assess multiple aspects of study and young men who have sex with men (YMSM).
Phase I of the study will be a cross-sectional descriptive study using a mixed methods data collection (focusing on qualitative data collection) to acquire information necessary for developing a more extensive study on the same matter.
Read more
Phase II of the study will be a prospective cohort study using a quantitative data collection.
Findings from phase I will guide the development of phase II which consist of a larger number of YMSM, important baseline and follow-up questionnaires and comorbidities assessments, sexually transmitted infections testing, and integration to care.
This protocol exclusively addresses the phase I of the study.
Once the phase I findings are finalized, the principal investigator will submit the phase II to the IRB of the Faculty of Medicine, Chulalongkorn University.
- Conditions
- ChemSex Users for YMSM, ChemSex Users
- Keywords
- ChemSex users
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Group 1 | A: Current chemsex users Men who have sex with men, Aged 16-35 years, Able to communicate in Thai fluently, Current chemsex users. B: Former chemsex users (discontinued ≥90 days) Men who have sex with men, Aged 16-35 years, Able to communicate in Thai fluently, Former chemsex users (discontinued ≥90 days). |
What is being measured
The primary outcome is the main question the study is designed to answer.
The study will be divided into two phases. The information on the procedures of the phase I single study visit is presented below.
Qualitative data collection The qualitative study component will use semi-structured individual in-depth interviews (IDIs) in Thai conducted in-person at the team community health clinic facilities. All participants will be included in the qualitative data collection - 40 YMSM, all 10 family members or peers of chemsex users, and all 10 clinic staff.
Quantitative data collection Demographic information of all participants, the proportion of all eligible participants who agree to participate in the study, and the relationship status between Group 2 and Group 1 participants will be collected.
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Sep 2022
- Study start20 Feb 2023
- Primary completion20 Mar 2026
- Study completion30 Mar 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ChemSex Users for YMSMStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- Institute of HIV Research and Innovation Foundation, Thailand
- Sponsor type
- University, hospital or other
- Collaborators
- amfAR, The Foundation for AIDS Research
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05559658
- Sponsor's protocol ID
- IHRI021
- Acronym
- CLYMAX
- Status last verified
- Apr 2026
- First submitted
- 26 Sep 2022
- Last updated
- 2 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Cross-sectional Descriptive Study Using Mixed Method (Qualitative and Quantitative) Data Collection
- ClinicalTrials.gov ID
- NCT05559658
- Acronym / sponsor ID
- CLYMAX / IHRI021
- Conditions
- ChemSex Users for YMSM, ChemSex Users
- Keywords
- ChemSex users
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- Institute of HIV Research and Innovation Foundation, ThailandUniversity, hospital or other
- Collaborators
- amfAR, The Foundation for AIDS Research
- Study start
- 20 Feb 2023 (actual)
- Primary completion
- 20 Mar 2026 (actual)
- Study completion
- 30 Mar 2026 (actual)
- First posted
- 29 Sep 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The study is a two-phase observational study that assess multiple aspects of study and young men who have sex with men (YMSM).
Phase I of the study will be a cross-sectional descriptive study using a mixed methods data collection (focusing on qualitative data collection) to acquire information necessary for developing a more extensive study on the same matter.
Phase II of the study will be a prospective cohort study using a quantitative data collection.
Findings from phase I will guide the development of phase II which consist of a larger number of YMSM, important baseline and follow-up questionnaires and comorbidities assessments, sexually transmitted infections testing, and integration to care.
This protocol exclusively addresses the phase I of the study.
Once the phase I findings are finalized, the principal investigator will submit the phase II to the IRB of the Faculty of Medicine, Chulalongkorn University.
Study design
- Observational model
- Cohort
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Group 1 | – | –A: Current chemsex users Men who have sex with men, Aged 16-35 years, Able to communicate in Thai fluently, Current chemsex users. B: Former chemsex users (discontinued ≥90 days) Men who have sex with men, Aged 16-35 years, Able to communicate in Thai fluently, Former chemsex users (discontinued ≥90 days). |
Who may qualify
- Ages
- 16 to 35 years
- Sex
- Male only
- Age groups
- Child, Adult
- Study population
- Current chemsex users
Key inclusion criteria (12 listed)
- Group 1A: Current chemsex users
- Men who have sex with men
- Aged 16-35 years
- Able to communicate in Thai fluently
- Current chemsex users
Key exclusion criteria (1 listed)
- No exclusion criteria for all groups of participants
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
The study will be divided into two phases. The information on the procedures of the phase I single study visit is presented below.
Time frame: 12 months
Qualitative data collection The qualitative study component will use semi-structured individual in-depth interviews (IDIs) in Thai conducted in-person at the team community health clinic facilities. All participants will be included in the qualitative data collection - 40 YMSM, all 10 family members or peers of chemsex users, and all 10 clinic staff. Quantitative data collection Demographic information of all participants, the proportion of all eligible participants who agree to participate in the study, and the relationship status between Group 2 and Group 1 participants will be collected.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Apr 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of ChemSex Users for YMSM and ChemSex Users, run by Institute of HIV Research and Innovation Foundation, Thailand at 1 site in Thailand.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 12 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Thailand. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The study will be divided into two phases. The information on the procedures of the phase I single study visit is presented below. (time frame: 12 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Apr 2026.