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

ArmDescriptionAssigned Intervention
Experimental
$5 gift card
  • Other: $5 gift card
    A $5 gift card is offered as an incentive to participation in the 3-month survey call.
Active Comparator
$100 monthly drawing
  • Other: $100 monthly drawing
    Entry into monthly drawing for $100 gift card is offered as an incentive to participation in the 3-month survey call.
No Intervention
No incentive 		No incentive is offered for participation in the 3-month survey call.

Recruiting Locations

Baywell Health
Oakland, California 94607
Contact:
Angela Shahbazian, OD, FAAO
510-835-9610
a.shahbazian@berkeley.edu

More Details

Status
Recruiting
Sponsor
University of California, San Francisco

Study Contact

Dionna Wittberg, MPH
13306083016
dionna.wittberg@ucsf.edu

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.