The Effectiveness of an E-Intervention on Health Behavior Promotion in Chinese University Students
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Hong Kong Baptist University
- Enrollment
- 621
- Primary Endpoint
- Change of weekly amount of physical activity (PA)
Study Overview
Brief 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.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- Single (Participant)
Eligibility Criteria
- Sex
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- •not professional athletes; not vegetarians
- •no contraindication with respect to the physical activity or fruit and vegetable consumption.
- •access to the Internet and a mobile phone.
Exclusion Criteria
- •have the restriction of physical mobility
- •have fruit-vegetable related diseases such as diabetes or fruit allergies.
Outcomes
Primary Outcomes
Change of weekly amount of physical activity (PA)
Time Frame: From baseline to 9 weeks (at the end of intervention) and 1-month follow-up
The level of PA will be measured through the short Chinese version of the IPAQ questionnaire (Macfarlane et al., 2007). Participants will be asked to estimate the number of days and hours spent for vigorous, moderate and walking activities during the past week.
Change of daily portions of fruit-vegetable intake (FVI)
Time Frame: From baseline to 9 weeks (at the end of intervention) and 1-month follow-up
The daily portions of FVI will be measured with four items, including fruit or vegetable juice, fruit, cooked or steamed vegetables, and raw vegetables (Rafferty et al., 2002). Respondents will be asked to count the number of portions of fruit and vegetables they consumed on average during a typical day.
Secondary Outcomes
- Change of outcome expectancies of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of intention of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of stage algorithm of behaviors change(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of risk perception of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of planning of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of compensatory health beliefs of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of perceived quality of life(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of body mass index (BMI)(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of perceived social support of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
- Change of self-efficacy of PA and FVI(From baseline to 9 weeks (at the end of intervention) and 1-month follow-up)
Investigators
Yanping DUAN
Assistant Professor, Dr. Duan
Hong Kong Baptist University