Testing Numeric Formats for Presenting Data About Treatment Benefits and Harms

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00950014

Enrollment

2944

Registered

2009-07-31

Start date

2009-08-31

Completion date

2009-09-30

Last updated

2010-04-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Risk Communication

Keywords

Numeracy

Brief summary

The purpose of this study is to test comprehension of five numeric formats used to present data about treatment benefits and harms.

Interventions

OTHERPresentation of drug efficacy and side effect data

Data presented in 1 of 5 numeric formats in each arm: percentage only, fixed frequency only, variable frequency, variable combination and fixed combination format.

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Masking

SINGLE (Investigator)

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Yes

Inclusion criteria

* Participants will be randomly selected from a research panel of more than 60,000 U.S. households (Knowledge Networks).

Design outcomes

Primary

Measure	Time frame
Comprehension questions (e.g., overall direction of effect and specific numeric data)	0 weeks (assessed during intervention)

Secondary

Measure	Time frame
Risk perceptions (e.g., how big or small is the benefit)and preferences (e.g., did the box help subjects understand the benefits) assessed via Internet surveys.	0 weeks (assessed during intervention)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 28, 2026