DentalNCT07083453
Financial Incentives to Encourage Uptake of Preventive Dental Care Services Among Adults
A study testing Comparator 1, Comparator 2 and Comparator 3 in people with Dental, run by National University of Singapore at 1 site in Singapore.
Trial summary
The study aims to assess if financial rebates affect the uptake of dental services among adults, determine the optimal level of financial rebates to encourage dental visits, and assess the factors associated with the uptake of dental services. Read more about this study
- Who is it for?
- Ages 21 to 85 yearsHealthy volunteers can take part
- Conditions the study is for
- Dental
- What is being tested?
- Comparator 1, Comparator 2 and Comparator 3
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 5,500 participants
- Where
- 1 siteSingapore
- Study dates
- 1 Dec 2023to 31 Mar 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
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 21 to 85 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Between 21 and 85 years of age (inclusive)
- Able to provide informed consent to participate in the study
- Able to read and comprehend English
Who cannot join
- Individuals with cognitive impairments or mental health conditions
Trial locations and contacts
1 site in 1 country.
About this study
The study aims to assess if financial rebates affect the uptake of dental services among adults, determine the optimal level of financial rebates to encourage dental visits, and assess the factors associated with the uptake of dental services.
Read the detailed description
Aim:
The project aims to assess the effect of various factors on the uptake of preventive dental services, including the impact of out-of-pocket costs on the uptake of preventive dental services.
The hypotheses of the study are:
- Out-of-pocket costs affect the uptake of preventive dental services
- A financial subsidy covering at least 50% of costs would increase the uptake of preventive dental services
- Financial subsidies have a greater impact on dental utilization among low-income adults compared to high income adults
- Conditions
- Dental
- Being tested
- Comparator 1, Comparator 2, Comparator 3, Comparator 4, Control
- Keywords
- Dental care, Oral health, Economics, Reimbursement, Incentive, Patient acceptance of health care
- Medical subject headings
- Patient Acceptance of Health Care
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Comparator 1Other
$10 rebate offered with an online caries and periodontal risk assessment
Comparator 2Other
20 rebate offered without risk assessment
Comparator 3Other
$30 rebate offered without risk assessment
Comparator 4Other
$50 rebate offered without risk assessment
ControlOther
$10 rebate offered with no risk assessment
| Study group | Role | What they receive |
|---|---|---|
| Control | Active comparator | $10 rebate offered Receives: Other: Control |
| Comparator 1 | Active comparator | $10 rebate offered with online and caries risk assessment Receives: Other: Comparator 1 |
| Comparator 2 | Active comparator | $20 rebate offered Receives: Other: Comparator 2 |
| Comparator 3 | Active comparator | $30 rebate offered Receives: Other: Comparator 3 |
| Comparator 4 | Active comparator | $50 rebate offered Receives: Other: Comparator 4 |
What is being measured
The primary outcome is the main question the study is designed to answer.
Uptake of dental services
Uptake of dental services
Measured: From baseline to up to 2 years after intervention
Secondary outcomes (4)
Change in oral hygiene practices
Change in % of participants that brush their teeth at least twice a day
Measured: From baseline to 1 year after intervention
Change in dietary practices
Change in % of participants that consume sugary foods or drinks at least once a day
Measured: From baseline to 1 year after intervention
Change in oral health related quality of life
Change in Oral Health Impact Profile-14 (OHIP-14) score. Minimum score: 0, Maximum score: 56. Higher scores reflect a worse outcome
Measured: From baseline to 1 year after intervention
Change in quality of life
Change in EuroQol five-dimension, five-level (EQ-5D-5L) score. Health states range from 11111 (best possible health state) to 55555 (worst possible health state).
Measured: From baseline to 1 year after intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jul 2025
- Study start1 Dec 2023
- Primary completion31 Mar 2026 (estimated)
- Study completion31 Mar 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for DentalStudies of the same condition, open and under way.
- More trials run by National University of SingaporeThe sponsor's other registered studies.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 5,500 participants (actual)
Sponsor and investigators
- Lead sponsor
- National University of Singapore
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Tan Hui Xuan Sharon, National University of Singapore
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07083453
- Sponsor's protocol ID
- NUS-IRB-2023-49
- Status last verified
- Jul 2025
- First submitted
- 7 Jul 2025
- Last updated
- 24 Jul 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided: To be confirmed pending participant consent.
Study at a glance
From the registry record, last updated by the sponsor on 24 Jul 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Financial Incentives to Encourage Uptake of Preventive Dental Care Services Among Adults
- ClinicalTrials.gov ID
- NCT07083453
- Acronym / sponsor ID
- NUS-IRB-2023-49
- Conditions
- Dental
- Keywords
- Dental care, Oral health, Economics, Reimbursement, Incentive, Patient acceptance of health care
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 5,500 participants (actual)
- Lead sponsor
- National University of SingaporeUniversity, hospital or other
- Study start
- 1 Dec 2023 (actual)
- Primary completion
- 31 Mar 2026 (estimated)
- Study completion
- 31 Mar 2026 (estimated)
- First posted
- 24 Jul 2025 (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 aims to assess if financial rebates affect the uptake of dental services among adults, determine the optimal level of financial rebates to encourage dental visits, and assess the factors associated with the uptake of dental services.
Detailed description
Aim:
The project aims to assess the effect of various factors on the uptake of preventive dental services, including the impact of out-of-pocket costs on the uptake of preventive dental services.
The hypotheses of the study are:
- Out-of-pocket costs affect the uptake of preventive dental services
- A financial subsidy covering at least 50% of costs would increase the uptake of preventive dental services
- Financial subsidies have a greater impact on dental utilization among low-income adults compared to high income adults
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 5
| Arm | Type | Receives |
|---|---|---|
| Control | Active comparator | Other: Control$10 rebate offered |
| Comparator 1 | Active comparator | Other: Comparator 1$10 rebate offered with online and caries risk assessment |
| Comparator 2 | Active comparator | Other: Comparator 2$20 rebate offered |
| Comparator 3 | Active comparator | Other: Comparator 3$30 rebate offered |
| Comparator 4 | Active comparator | Other: Comparator 4$50 rebate offered |
Who may qualify
- Ages
- 21 to 85 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Between 21 and 85 years of age (inclusive)
- Able to provide informed consent to participate in the study
- Able to read and comprehend English
Key exclusion criteria (1 listed)
- Individuals with cognitive impairments or mental health conditions
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Comparator 1$10 rebate offered with an online caries and periodontal risk assessment | Other | Comparator 1 |
| Comparator 220 rebate offered without risk assessment | Other | Comparator 2 |
| Comparator 3$30 rebate offered without risk assessment | Other | Comparator 3 |
| Comparator 4$50 rebate offered without risk assessment | Other | Comparator 4 |
| Control$10 rebate offered with no risk assessment | Other | Control |
Primary outcome
Uptake of dental services
Time frame: From baseline to up to 2 years after intervention
Uptake of dental services
4 secondary outcomes
Change in oral hygiene practices
Time frame: From baseline to 1 year after intervention
Change in dietary practices
Time frame: From baseline to 1 year after intervention
Change in oral health related quality of life
Time frame: From baseline to 1 year after intervention
Change in quality of life
Time frame: From baseline to 1 year after intervention
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 24 Jul 2025.
- Individual participant dataSharing planned: Undecided. To be confirmed pending participant consent.
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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?
A study testing Comparator 1, Comparator 2 and Comparator 3 in people with Dental, run by National University of Singapore at 1 site in Singapore.
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 3 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: under way, not looking for participants, as of the sponsor's last update on 24 Jul 2025. 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 Singapore. 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?
This study is still under way. Results are not available in the source record yet.
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?
Uptake of dental services (time frame: From baseline to up to 2 years after intervention). 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 24 Jul 2025.