Text message intervention to increase fruit and vegetable consumption in Thai university students

Last registered on February 02, 2024
View Trial History

Pre-Trial

Trial Information

General Information

Title
Text message intervention to increase fruit and vegetable consumption in Thai university students
RCT ID
AEARCTR-0012923
Initial registration date
February 01, 2024

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
February 02, 2024, 4:20 PM EST

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

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Primary Investigator

Name
Manasigan Kanchanachitra
Affiliation
Contact Primary Investigator

Other Primary Investigator(s)

PI Name
Chalermpol Chamchan
PI Affiliation

Additional Trial Information

Status
In development
Start date
2024-02-19
End date
2024-08-30
Keywords
Behavior, Health
Additional Keywords
JEL code(s)
Secondary IDs
Prior work
This trial does not extend or rely on any prior RCTs.
Abstract
This study aims to evaluate the effectiveness of text messaging in increasing fruit and vegetable consumption among Thai university students. The messages will be designed based on the COM-B framework: capability, opportunity, and motivation. Our goal is to identify message types with the greatest potential to induce behavioral change.
External Link(s)

Registration Citation

Citation
Chamchan, Chalermpol and Manasigan Kanchanachitra. 2024. "Text message intervention to increase fruit and vegetable consumption in Thai university students." AEA RCT Registry. February 02. https://doi.org/10.1257/rct.12923-1.0
Sponsors & Partners

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Experimental Details

Interventions

Intervention(s)
Sending text message based on the COM-B framework to boost higher fruit and vegetable consumption among Thai university students.
Intervention Start Date
2024-02-26
Intervention End Date
2024-03-31

Primary Outcomes

Primary Outcomes (end points)
Level of fruit and vegetable consumption, capability, opportunity, and motivation related to fruit and vegetable consumption
Primary Outcomes (explanation)

Secondary Outcomes

Secondary Outcomes (end points)
Secondary Outcomes (explanation)

Experimental Design

Experimental Design
Sending text message based on the COM-B framework to boost higher fruit and vegetable consumption among Thai university students. 120 participants will be randomized into one of four intervention groups.
Group 1: Opportunity messages
Group 2: Opportunity + capability messages
Group 3: Motivation messages
Group 4: Motivation + capability messages

The experiment will last five weeks, with the first week being no intervention for all groups to collect the baseline consumption level. Week 2-5, participants will receive 3 - 5 messages per week. At the end of each day, participants will fill out a quick survey about fruit and vegetable consumption in each day.
Experimental Design Details
Not available
Randomization Method
Participants will be randomized in office by a computer
Randomization Unit
Randomization at the individual level.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
120 university students
Sample size: planned number of observations
120 university students
Sample size (or number of clusters) by treatment arms
30 university students in each arm, 4 arms in tota
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
Supporting Documents and Materials
IRB

Institutional Review Boards (IRBs)

IRB Name
Institute for Population and Social Research, Mahidol University, Thailand
IRB Approval Date
2023-09-28
IRB Approval Number
COA.No.2023/09-196
Analysis Plan