Recruiting

Incentive Approaches

Sponsor:

UCLA

Code:

NCT07755748

Conditions

Screening

Eligibility Criteria

Sex: All

Age: 50+

Healthy Volunteers: Not accepted

Interventions

$5 gift card

$100 monthly drawing

Study Details

Brief summary:

This is a randomized trial to assess whether offering a financial incentive will improve the response rate to a telephone survey. Three incentive approaches will be compared: a $5 gift card, entry into a monthly $100 drawing, or no incentive.

Conditions

Screening

Study ID

NCT07755748

Start date

Feb 1, 2026

Status verified date

Sep, 2026

Completion date

Sep 30, 2029

Anticipated

Primary completion date

Jan 31, 2029

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 50+

Healthy Volunteers: Not accepted

Inclusion Criteria:

\- Participating in GSEARCH trial

Exclusion Criteria:

\- Patients without a valid phone number

Study Design

Enrollment

2000 participants

Anticipated

Allocation

Randomized

Intervention Model

Parallel Assignment

Primary purpose

Screening

Interventions and Outcome Measures

Arms

experimental: $5 gift card

active comparator: $100 monthly drawing

no intervention: No incentive

No incentive is offered for participation in the 3-month survey call.

Interventions

$5 gift card

A $5 gift card is offered as an incentive to participation in the 3-month survey call.

$100 monthly drawing

Entry into monthly drawing for $100 gift card is offered as an incentive to participation in the 3-month survey call.

Primary outcome measure

  • Survey completion [ Time Frame: One month after the outreach call is completed ]

Central Contacts and Locations

Central contacts

Dionna Wittberg, MPH

13306083016dionna.wittberg@ucsf.edu

Jeremy D Keenan, MD MPH

jeremy.keenan@ucsf.edu

Locations

Baywell Health

Recruiting

Oakland, California, United States, 94607

Contacts

Angela Shahbazian, OD, FAAO

510-835-9610a.shahbazian@berkeley.edu

More Information

Sponsor

University of California, San Francisco

Last update posted

Sep 9, 2026

Last verified

Sep, 2026

Keywords

  • Screening
  • Response rate
  • incentive
  • glaucoma

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by University of California, San Francisco on 2026-09-09.