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| Name | Class |
|---|---|
| Food and Health Bureau, Hong Kong | OTHER_GOV |
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The aim of this study is to investigate the effectiveness of the family and behavioral theory based mobile-health behavioral intervention in enhancing adolescents'good oral health behaviors (mainly oral hygiene practice and free sugar intake control) and preventing common oral diseases (dental caries and periodontal diseases).
The investigators propose a 30-months clustered randomized controlled trial to investigate the effectiveness of Health Belief Model (HBM) and family-based mobile-health intervention in enhancing the adolescents' good oral health behaviors and preventing oral diseases.
This is a three-arm parallel-design cluster-randomized controlled trial. Parents and their children (12 to 15-year-old) will be recruited and randomized into 3 groups based on the school sites.
Messages targeted on six domains guided by HBM will be sent to the adolescents and their parents via mobile phone. Two blocks of HBM-based oral health messages, reminders, feedback and reinforcement messages will be delivered to both students and parents by mobile phone for 24 weeks; while the intervention of the other 2 groups will target on students only or using prevailing oral health education.
The primary outcomes will be caries increment of the adolescents 2-year post-intervention. Change in oral health self-efficacy and behaviors, dental plaque and gingival bleeding index will be the secondary outcomes.
The investigators anticipate the proposed family- and HBM-based behavioral intervention is more effective than HBM-based mobile-health intervention on adolescents alone or prevailing oral health education in improving the adolescents' oral hygiene behaviors, reducing free-sugar intake and preventing oral diseases.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Families HBM- mobile messaging | Experimental | Family- and HBM-based behavioral intervention using mobile messaging |
|
| Adolescents HBM- mobile messaging | Active Comparator | Student- and HBM-based behavioral intervention using mobile messaging |
|
| Adolescents e-pamphlets | Placebo Comparator | Prevailing oral health education by e-version of pamphlets through mobile messaging |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Family HBM- mobile messaging | Behavioral | The intervention will consist of two blocks of text messaging based on HBM model, the messages will be sent to the students and their parents in the following 24 weeks. |
| Measure | Description | Time Frame |
|---|---|---|
| Caries increment | Dental caries increment (by tooth level) from baseline to 2 years follow up | 2 years |
| Measure | Description | Time Frame |
|---|---|---|
| Change of oral health self-efficacy | Change from baseline self-efficacy at 2 years | 2 years |
| Change of gingival status | Change from baseline gingival bleeding (BOP%) at 2 years, as recommended by the WHO for conducting oral health surveys |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Pei LIU | Contact | 852-28590571 | peiliu@hku.hk |
| Name | Affiliation | Role |
|---|---|---|
| Pei LIU | The University of Hong Kong | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Dentistry, The University of Hong Kong | Recruiting | Hong Kong | Hong Kong |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 36384815 | Derived | Liu P, Wong MCM, Lee GHM, Yiu CKY, Lo ECM. Family behavior theory-based intervention via mobile messaging to improve oral health of adolescents: study protocol for a cluster randomized controlled trial. Trials. 2022 Nov 16;23(1):941. doi: 10.1186/s13063-022-06861-1. |
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Three-arm parallel design cluster randomized controlled trial
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| Adolescent HBM- mobile messaging | Behavioral | The intervention will consist of two blocks of text messaging based on HBM model, the messages will be sent to the students in the following 24 weeks. |
|
| Adolescent e-pamphlets | Behavioral | The contents of e-version of three pamphlets, published by Department of Health (http://www.toothclub.gov.hk/en/en\_index.html) will be distributed in an electronic form and sent via a mobile message. |
|
| 2 years |
| Change of toothbrushing behavior | Change from baseline average frequency of toothbrushing per day at 2 years | 2 years |
| Change of free-sugar intake | Change from baseline average frequency of intake of sugary snack/drink per day at 2 years | 2 years |