Glaucoma Screening to Enhance At-Risk Californians' Health - Survey Response Incentives
Purpose
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.
Condition
- Screening
Eligibility
- Eligible Ages
- Over 50 Years
- Eligible Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Participating in GSEARCH trial
Exclusion Criteria
- Patients without a valid phone number
Study Design
- Phase
- N/A
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel Assignment
- Primary Purpose
- Screening
- Masking
- None (Open Label)
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
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. |
|
Recruiting Locations
Oakland, California 94607
More Details
- Status
- Recruiting
- Sponsor
- University of California, San Francisco
Detailed Description
This is a sub-trial nested within a larger randomized trial called GSEARCH. The parent trial evaluates whether telemedicine glaucoma screening is more effective for detecting undiagnosed glaucoma cases compared with education alone or delayed intervention, with the final outcomes assessed via a follow-up telephone surveys at 3 months and 12 months. In this sub-study, we will assess whether adding an incentive improves the survey response completion rate. Participants enrolled in the parent GSEARCH trial will be eligible. Participants will be randomized to one of three incentive approaches, offered by telephone at the time of the follow-up survey ($5 gift card, entry into a monthly $100 drawing, or no incentive). The primary outcome will be completion of the telephone survey.