NCT03627949

The Effectiveness of an E-Intervention on Health Behavior Promotion in Chinese University Students

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 621 (actual)
• Sponsor: Hong Kong Baptist University · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Accepted

Summary

Through the internet and mobile phone SMS technology, and by using the Health Action Process Approach model as a theoretical backdrop, this 8-week theory-based intervention study aimed at developing a healthy lifestyle by supporting physical activity (PA) and a healthy dietary for Chinese university students. The investigators would examine whether the two intervention groups improve the participants' motivation for PA and healthy diets in comparison to the control group; whether, with the help of an intervention program, students are able to increase the PA levels and healthy diet consumption, and whether there are different effects between the two intervention programs.

Detailed description

For the main study, the sample size was estimated by using G\*Power 3.1 software with MANOVA approach (repeated measure). For achieving small effect size of 0.15 (Lippke, Fleig, Wiedemann, \& Schwarzer, 2015), with a power (1-β) of 0.8 and alpha of 0.05, the total sample size was 306. Assuming a drop-out rate of approximately 30%, a total of 399 participants were required for the study evaluation. The effects of the intervention were evaluated by performing several analyses of MANOVA and MANCOVA measured at three points in time (8-week apart pre-post measures, and four weeks follow-up; T1-T3).In addition, moderated multiple mediation analysis was performed (Independent variable: intervention; Moderators: stage; Dependent variable: behavioural and social-cognitive outcomes). Baseline characteristics of participants who dropped out were compared with participants who finished the intervention to examine whether drop out is at random or determined by specific characteristics.

Conditions

• Health Behavior
• Physical Activity
• Healthy Diet

Interventions

Type	Name	Description
BEHAVIORAL	E-intervention	The intervention will address the basic elements of the HAPA model via the use of behaviour change techniques. In line with Abraham and Michie (2008), we use several behaviour change techniques like providing information about behavioural risk and benefit of behaviour change, prompting intention formation, prompting barrier identification, providing instructions how to perform a behaviour, prompting specific goal setting and review of behavioural goals, providing feedback on performance, prompting practice and providing follow-up prompts, prompting to plan social support and finally prompting relapse prevention, also based on strategies used by other effective computer tailoring programs. Students attended e-health intervention session once a week with about 20 minutes each time.

Timeline

• Start date: 2016-06-01
• Primary completion: 2017-12-31
• Completion: 2018-02-28
• First posted: 2018-08-14
• Last updated: 2019-04-18