Clinical trial NCT04426331: Vouchers to Increase Uptake of Already Free Eye Care
Official title: Providing Vouchers Redeemable for Already Free Eye Exams To Increase Uptake Among a Low-Income Minority Population: A Randomized Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Glaucoma
Eye Diseases
Keywords: voucher
information
health behavior
Lead sponsor: Johns Hopkins University
Sponsor class: OTHER
Collaborators: name: Centers for Disease Control and Prevention
First posted: 2020-06-11
Enrollment: 739
Sex: ALL
Minimum age (years): 50
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: Cluster randomized study: screening events (clusters) randomized to one of three interventions, outcomes from individuals within clusters tracked.
Primary purpose: HEALTH_SERVICES_RESEARCH

Brief summary: This study was intended to test if reframing an offer for a free follow-up eye examination could increase uptake within ongoing community-based screening program for low-income and minority populations in Baltimore City. This study evaluated the effect of offering participants a physical voucher they were told was redeemable for free follow-up, relative to simply telling participants that the follow-up appointment would be free of charge. The investigators assessed two forms of vouchers, one with estimated value information, and one without. The underlying hypothesis was that reframing these already free offers would increase uptake by increasing perceived offer value and increasing a sense of regret from not taking advantage of a "good deal."


Eligibility criteria: Inclusion Criteria:

* Referred for follow-up at a Screening to Prevent Glaucoma (SToP) study screening event (overarching observational study from which trial sample was drawn). SToP participants were referred for follow-up for any of the following conditions: (1) VA worse than 20/40 in at least 1 eye despite autorefraction; (2) signs of retinal abnormalities on fundus photography; (3) uninterpretable fundus photography; (4) cup-to-disc ratio (CDR) greater than or equal to 0.9, and/or CDR between 0.7 and 0.9 with visual field defects or history of glaucoma; and (5) IOP of 23 mm Hg or greater.

Exclusion Criteria:

* SToP participants who were not referred at the time of screening but later contacted after review of fundus photography
* SToP participants who were referred for follow-up but stated at the time of counseling that they were already under the care of an eye doctor

Primary outcomes:
measure: Uptake of follow-up appointment
timeFrame: Within 90 days of the date of screening
Secondary outcomes:
measure: Uptake of initial appointment
timeFrame: Within 90 days of the date of screening
Other outcomes:
Locations:
city: Baltimore
country: United States
facility: Johns Hopkins Hospital - Wilmer Eye Institute
state: Maryland
Study officials:
affiliation: Johns Hopkins School of Medicine
name: Seema Kacker, PhD
role: PRINCIPAL_INVESTIGATOR
affiliation: Massachusetts Eye and Ear Hospital
name: David S Friedman, MD PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Zhao D, Guallar E, Gajwani P, Swenor B, Crews J, Saaddine J, Mudie L, Varadaraj V, Friedman DS; SToP Glaucoma Study Group. Optimizing Glaucoma Screening in High-Risk Population: Design and 1-Year Findings of the Screening to Prevent (SToP) Glaucoma Study. Am J Ophthalmol. 2017 Aug;180:18-28. doi: 10.1016/j.ajo.2017.05.017. Epub 2017 May 24.