Condition category
Nutritional, Metabolic, Endocrine
Date applied
05/03/2015
Date assigned
08/04/2015
Last edited
07/04/2015
Prospective/Retrospective
Retrospectively registered
Overall trial status
Completed
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
Mobile phone applications (apps) are considered to have great potential in helping to tackle the global health challenge of obesity. Promoting a healthy diet to the general population is getting attention. Many such mobile phone apps include the participant being able to report on what they have eaten (or not eaten) in a dietary log or planner. However, they usually only ask for the type of food and the quantity that is eaten. To make such a mobile phone app more useful, a user-friendly and effective way of measuring the amount of food eaten wherever the participant happens to be is needed. In this study, we developed a promising dietary food measurement on mobile devices and two visual-based interactive app alternatives were designed to appeal to young adults. This study compares these two apps in terms of how easy they are to use.

Who can participate?
Collegiate students aged at least 18 and attending Chang Gung University (Taiwan)

What does the study involve?
The visual-based interactive apps being tested are the IPI (interactive photo interface) and SBI (sketching-based interface). IPI uses pre-determined images of a specific food which the users can flick though and select the one most representative of the amount eaten. SBI compares the amount of food to a readily available comparator (e.g., a credit card) and the users can scribble to shade in the appropriate area. We then look at how well the apps perform in terms of accuracy rate, response time, and subjective assessment. Participants taking part in the study are randomly assigned to one of three groups. Those in group 1 use the IPI app. Those in group 2 use the SBI app. Those participants in group 3 are in the control group and are given traditional life-sized photos (TLP) of food portions. 18 food items in which the portion of each food are used and the portion of each of these foods is also randomly selected.

What are the possible benefits and risks of participating?
Not provided at time of registration.

Where is the study run from?
Food Interaction Design Lab, Department of Industrial Design, College of Management, Chang Gung University (Taiwan)

When is study starting and how long is it expected to run for?
November 2012 to February 2014

Who is funding the study?
1. Chang Gung Memorial Hospital, Taoyuan (Taiwan)
2. Research Fund of Chang Gung University (Taiwan)
3. Ministry of Science and Technology (Taiwan)

Who is the main contact?
Dr. Sherry Yueh-Hsia Chiu
sherrychiu@mail.cgu.edu.tw

Trial website

Contact information

Type

Scientific

Primary contact

Dr Sherry Yueh-Hsia Chiu

ORCID ID

http://orcid.org/0000-0002-7207-7088

Contact details

No. 259
Wen-Hwa 1st Road
Kwei-Shan
Tao-Yuan
333
Taiwan
+886-3-2118800 ext 5250
sherrychiu@mail.cgu.edu.tw

Additional identifiers

EudraCT number

ClinicalTrials.gov number

Protocol/serial number

101-3876B

Study information

Scientific title

Design and usability evaluation of user-centered and visual-based aids for dietary food measurement on mobile devices in a randomized controlled trial

Acronym

Study hypothesis

To design a promising dietary food measurement on mobile devices, and two interactive aids for apps were designed. A randomized controlled trial was conducted to evaluate user usability.

Ethics approval

Ethics Committee of Chang Gung Memorial Hospital, 14/01/2013, ref: 101-3876B.

Study design

Randomized controlled trial

Primary study design

Interventional

Secondary study design

Randomised controlled trial

Trial setting

Schools

Trial type

Other

Patient information sheet

Condition

Diet

Intervention

Overall, 36, 38, and 34 subjects were randomly assigned to the interactive photo interface (IPI), sketching-based interface (SBI), and traditional life-size photo (TLP) groups, respectively.

Intervention type

Behavioural

Phase

Drug names

Primary outcome measures

Two types of outcomes were conducted to evaluate the usability of mobile devices for dietary measurement, and these outcomes included the correct proportion of dietary food measurement.
1. Accuracy was one type of outcome and was defined as the number of correct counts divided by overall counts
2. Absolute weight difference in grams compared with the standard.

Secondary outcome measures

1. The duration of the response time consumed in seconds for each item was automatically recorded by the apps.
2. Subjective evaluation for preference was determined by conducting food portion measurements and operating the interface.

Overall trial start date

01/11/2012

Overall trial end date

07/02/2014

Reason abandoned

Eligibility

Participant inclusion criteria

Collegiate students aged 18 or over of Chang Gung University.

Participant type

Healthy volunteer

Age group

Adult

Gender

Both

Target number of participants

120

Participant exclusion criteria

N/A

Recruitment start date

14/01/2013

Recruitment end date

31/08/2013

Locations

Countries of recruitment

Taiwan

Trial participating centre

College of Management
Chang Gung University No. 259 Wen-Hwa 1st Road Kwei-Shan
Tao-Yuan
333
Taiwan

Sponsor information

Organisation

Ministry of Science and Technology, Taiwan and Chang Gung University

Sponsor details

No. 259
Wen-Hwa 1st Road
333 Kwei-Shan
Tao-Yuan
333
Taiwan
+886-3-2118800 ext 5250
sherrychiu@mail.cgu.edu.tw

Sponsor type

University/education

Website

http://www.cgu.edu.tw/bin/home.php

Funders

Funder type

University/education

Funder name

Chang Gung University

Alternative name(s)

CGU

Funding Body Type

private sector organisation

Funding Body Subtype

academic

Location

Taiwan

Results and Publications

Publication and dissemination plan

Intention to publish date

Participant level data

Available on request

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes