NCT05520242

Brief Summary

The aim of this study is to examine the potential for animation movies to improve response rates and sample composition in an embedded randomized controlled trial in the Danish National Health Survey 2021. The overall research question is whether cover letters including an animation movie can perform better than generic letters.

Trial Health

87
On Track

Trial Health Score

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

Enrollment
201,200

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Feb 2021

Shorter than P25 for not_applicable

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

First Submitted

Initial submission to the registry

January 3, 2021

Completed
1 month until next milestone

Study Start

First participant enrolled

February 5, 2021

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

May 15, 2021

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

May 15, 2021

Completed
1.3 years until next milestone

First Posted

Study publicly available on registry

August 29, 2022

Completed
Last Updated

August 29, 2022

Status Verified

August 1, 2022

Enrollment Period

3 months

First QC Date

January 3, 2021

Last Update Submit

August 26, 2022

Conditions

Outcome Measures

Primary Outcomes (1)

  • The number of invited individuals who respond to the survey

    A respond is registered if the invited sample member responds to at least 1 question

    3 month

Study Arms (5)

Control

NO INTERVENTION

No animation

General animation movie

EXPERIMENTAL

Participants randomized to receive the general animation video

Other: Use of small animation movies to increase response in a national health survey

Men aged 16-24 years

EXPERIMENTAL

Participants randomized to receive the animation targeted men aged 16-24 years

Other: Use of small animation movies to increase response in a national health survey

Women aged 75 years or older

EXPERIMENTAL

Participants randomized to receive the animation targeted women aged 75 years or older

Other: Use of small animation movies to increase response in a national health survey

Ethnic minorities

EXPERIMENTAL

Participants randomized to receive the animation targeted ethnic minorities

Other: Use of small animation movies to increase response in a national health survey

Interventions

Inclusion of animation movies in the invitation cover letter to a national health survey is tested in an embedded randomized controlled trial in the Danish National Health Survey 2021.

Ethnic minoritiesGeneral animation movieMen aged 16-24 yearsWomen aged 75 years or older

Eligibility Criteria

Age16 Years+
Sexall
Healthy VolunteersNo
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

  • Aged 16 years or older and living in Denmark at January 1th 2021.
  • Able to receive an invitation through a secure electronical mail service (Digital Post).

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

National Institute of Public health, University of Southern Denmark

Copenhagen, 1353, Denmark

Location

Related Publications (1)

  • Christensen AI, Lau CJ, Poulsen HS, Ekholm O. Do animation videos increase participation in national health surveys? A randomised controlled trial. BMC Med Res Methodol. 2023 Aug 14;23(1):184. doi: 10.1186/s12874-023-02005-4.

Study Officials

  • Anne I Christensen

    University of Southern Denmark

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
OUTCOMES ASSESSOR
Purpose
HEALTH SERVICES RESEARCH
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

January 3, 2021

First Posted

August 29, 2022

Study Start

February 5, 2021

Primary Completion

May 15, 2021

Study Completion

May 15, 2021

Last Updated

August 29, 2022

Record last verified: 2022-08

Data Sharing

IPD Sharing
Will not share

Locations