Abstract:
BACKGROUND:Web-based computer-tailored interventions for multiple health behaviors can improve the strength of behavior habits in people who want to reduce their cardiovascular risk. Nonetheless, few randomized controlled trials have tested this assumption to date. OBJECTIVE:The study aim was to test an 8-week Web-based computer-tailored intervention designed to improve habit strength for physical activity and fruit and vegetable consumption among people who want to reduce their cardiovascular risk. In a randomized controlled design, self-reported changes in perceived habit strength, self-efficacy, and planning across different domains of physical activity as well as fruit and vegetable consumption were evaluated. METHODS:This study was a randomized controlled trial involving an intervention group (n=403) and a waiting control group (n=387). Web-based data collection was performed in Germany and the Netherlands during 2013-2015. The intervention content was based on the Health Action Process Approach and involved personalized feedback on lifestyle behaviors, which indicated whether participants complied with behavioral guidelines for physical activity and fruit and vegetable consumption. There were three Web-based assessments: baseline (T0, N=790), a posttest 8 weeks after the baseline (T1, n=206), and a follow-up 3 months after the baseline (T2, n=121). Data analysis was conducted by analyzing variances and structural equation analysis. RESULTS:Significant group by time interactions revealed superior treatment effects for the intervention group, with substantially higher increases in self-reported habit strength for physical activity (F1,199=7.71, P=.006, Cohen's d=0.37) and fruit and vegetable consumption (F1,199=7.71, P=.006, Cohen's d=0.30) at posttest T1 for the intervention group. Mediation analyses yielded behavior-specific sequential mediator effects for T1 planning and T1 self-efficacy between the intervention and habit strength at follow-up T2 (fruit and vegetable consumption: beta=0.12, 95% CI 0.09-0.16, P<.001; physical activity: beta=0.04, 95% CI 0.02-0.06, P<.001). CONCLUSIONS:Our findings indicate the general effectiveness and practicality of Web-based computer-tailored interventions in terms of increasing self-reported habit strength for physical activity and fruit and vegetable consumption. Self-efficacy and planning may play major roles in the mechanisms that facilitate the habit strength of these behaviors; therefore, they should be actively promoted in Web-based interventions. Although the results need to take into account the high dropout rates and medium effect sizes, a large number of people were reached and changes in habit strength were achieved after 3 months. TRIAL REGISTRATION:Clinicaltrials.gov NCT01909349; https://clinicaltrials.gov/ct2/show/NCT01909349 (Archived by WebCite at http://www.webcitation.org/6g5F0qoft) and Nederlands Trial Register NTR3706 http://www.trialregister.nl/ trialreg/admin/rctview.asp?TC=3706 (Archived by WebCite at http://www.webcitation.org/6g5F5HMLX).
journal_name
J Med Internet Resjournal_title
Journal of medical Internet researchauthors
Storm V,Dörenkämper J,Reinwand DA,Wienert J,De Vries H,Lippke Sdoi
10.2196/jmir.5147subject
Has Abstractpub_date
2016-04-11 00:00:00pages
e78issue
4eissn
1439-4456issn
1438-8871pii
v18i4e78journal_volume
18pub_type
杂志文章,随机对照试验abstract:BACKGROUND:In December 2019, pneumonia cases of unknown origin were reported in Wuhan City, Hubei Province, China. Identified as the coronavirus disease (COVID-19), the number of cases grew rapidly by human-to-human transmission in Wuhan. Social media, especially Sina Weibo (a major Chinese microblogging social media s...
journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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abstract:: ...
journal_title:Journal of medical Internet research
pub_type: 杂志文章,已发布勘误
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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pub_type: 杂志文章,随机对照试验
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journal_title:Journal of medical Internet research
pub_type: 杂志文章,meta分析
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journal_title:Journal of medical Internet research
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更新日期:2015-06-16 00:00:00
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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journal_title:Journal of medical Internet research
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