Use of Animations Movies to Increase Response in a National Health Survey

Study Overview
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Brief Summary
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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.

Detailed Description
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The aim of this study is to examine the potential of animation videos to improve response rates and sample composition in an embedded randomized controlled trial in the Danish National Health Survey 2021 (DNHS-2021). The overall research question is whether digital cover letters including an animation video can perform better than digital letters without animations. The proposition is that such letters should increase the willingness of some sample members to participate by means of increased motivation and reduced complexity, and that this will be reflected in higher response rates. In addition to examining whether it can be advantageous for overall response rates to use cover letters including animation videos, this study also examines the effect of different versions of the animation videos across sample subgroups in order to identify how to best target potential non-respondents in future surveys.

Official Title
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Use of Small Animations Movies to Increase Response in a National Health Survey. A Random-ised Controlled Trial. A Study Protocol

Conditions
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Response, Non-response

Intervention / Treatment
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* Other: Use of small animation movies to increase response in a national health survey


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 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).

Ages Eligible for Study
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Minimum Age: 16 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Health Services Research
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Control<br>No animation | |
| Experimental: General animation movie<br>Participants randomized to receive the general animation video | Other: Use of small animation movies to increase response in a national health survey<br>* 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.<br>|
| Experimental: Men aged 16-24 years<br>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<br>* 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.<br>|
| Experimental: Women aged 75 years or older<br>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<br>* 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.<br>|
| Experimental: Ethnic minorities<br>Participants randomized to receive the animation targeted ethnic minorities | Other: Use of small animation movies to increase response in a national health survey<br>* 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.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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 |