Brief Summary

Randomized trial testing 6 forms of a communication summarizing the results of a recent study (about the effects of wearing glasses on reducing covid infection risk). The goal of the trial is to test the effect of different language options to describe uncertainty, and of including the margin of error around the main result.

Trial Health

On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment

960

participants targeted

Target at P75+ for not_applicable covid19

Timeline

Completed

Started Dec 2022

Shorter than P25 for not_applicable covid19

Geographic Reach

1 country

1 active site

Status

completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

4 months study duration

First Submitted

Initial submission to the registry

November 30, 2022

Completed

1 day until next milestone

Study Start

First participant enrolled

December 1, 2022

Completed

7 days until next milestone

First Posted

Study publicly available on registry

December 8, 2022

Completed

2 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 31, 2023

Completed

2 months until next milestone

Study Completion

Last participant's last visit for all outcomes

March 31, 2023

Completed

Last Updated

May 22, 2024

Status Verified

May 1, 2024

Enrollment Period

2 months

First QC Date

November 30, 2022

Last Update Submit

May 20, 2024

Conditions

COVID-19

Keywords

Colloquial languageuncertaintybias

Outcome Measures

Primary Outcomes (4)

understanding of overall uncertainty of benefit (of wearing glasses to reduce the chance of covid infection)
How sure about the effect (4 point scale from very unsure to very sure)
within 1 day
understanding of overall uncertainty of harm (of wearing glasses to reduce the chance of covid infection)
How sure about the effect (4 point scale from very unsure to very sure)
within 1 day
sufficiency of what is known about the effects of wearing glasses to reduce the chance of covid infection
How sure about the effect (4 point Likert scale)
within 1 day
Understanding the margin of error around the benefit of wearing glasses to reduce covid
this is a co-primary outcome which will be used only to compare the 3 versions that include the margin of error to the 3 versions that do not
within 1 day

Secondary Outcomes (13)

perceived effect of wearing glasses to reduce chance of covid infection
within 1 day
how likely is it that wearing glasses reduces the chance of covid infection
within 1 day
intended behavior (if there were a surge in covid in your area, how likely would you be to wear glasses to reduce the chance of covid infection
within 1 day
intended behavior (if there were very few cases of covid in your area, how likely would you be to wear glasses to reduce the chance of covid infection
within 1 day
perceptions fo information provided (trustworthy summary?)
within 1 day
+8 more secondary outcomes

Study Arms (6)

GRADE + margin of error

ACTIVE COMPARATOR

Overall uncertainty using GRADE\* language AND margin of error around main result \* Based on the Cochrane Effective Practice and Organisation of Care Group's guidance for communicating the certainty of evidence based on the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach to assessing the certainty of evidence