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Predicting sugar-sweetened behaviours with theory of planned behaviour constructs: Outcome and process results from the SIPsmartER behavioural intervention.

ABSTRACT: Guided by the theory of planned behaviour (TPB) and health literacy concepts, SIPsmartER is a six-month multicomponent intervention effective at improving SSB behaviours. Using SIPsmartER data, this study explores prediction of SSB behavioural intention (BI) and behaviour from TPB constructs using: (1) cross-sectional and prospective models and (2) 11 single-item assessments from interactive voice response (IVR) technology.Quasi-experimental design, including pre- and post-outcome data and repeated-measures process data of 155 intervention participants.Validated multi-item TPB measures, single-item TPB measures, and self-reported SSB behaviours. Hypothesised relationships were investigated using correlation and multiple regression models.TPB constructs explained 32% of the variance cross sectionally and 20% prospectively in BI; and explained 13-20% of variance cross sectionally and 6% prospectively. Single-item scale models were significant, yet explained less variance. All IVR models predicting BI (average 21%, range 6-38%) and behaviour (average 30%, range 6-55%) were significant.Findings are interpreted in the context of other cross-sectional, prospective and experimental TPB health and dietary studies. Findings advance experimental application of the TPB, including understanding constructs at outcome and process time points and applying theory in all intervention development, implementation and evaluation phases.

SUBMITTER: Zoellner JM

PROVIDER: S-EPMC5568048 | biostudies-other | 2017 May

REPOSITORIES: biostudies-other

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Project description:BackgroundRegistered dietitians working in team-based primary care settings (e.g., family health teams [FHTs]) are positioned to counsel on physical activity and sedentary behaviour when providing nutrition-related services to promote health and prevent disease. This qualitative study explored FHT registered dietitians' beliefs and behaviours related to counselling patients on physical activity and sedentary behaviour.MethodsTwenty registered dietitians in FHTs in Ontario, Canada were interviewed in person. Theory of planned behaviour guided the development of this cross-sectional, descriptive study. Thematic analysis was used to identify themes within each of the following theoretical constructs (topics): registered dietitians' behaviour (practice), behavioural intention, attitude, subjective norm, and perceived behavioural control related to physical activity and sedentary behaviour counselling.ResultsAll participants counselled patients on physical activity, using some motivational interviewing strategies, and most counselled on sedentary behaviour. Many participants intended to continue their current physical activity counselling practices and increase sedentary behaviour counselling. Some participants had a positive attitude about the effectiveness of counselling on physical activity and sedentary behaviour, but their belief about effectiveness was dependent on factors such as time frame for behaviour change. Many participants felt that other health care professionals expected them to counsel on physical activity and they believed that other registered dietitians counsel on physical activity and sedentary behaviour. Facilitators to counselling included FHT dynamics and time with patients. In terms of barriers, almost all participants were confident in basic PA counselling only and contended that only this is within their scope of practice. Many participants posited that exercise prescription is outside their scope of practice. Other barriers included registered dietitians' lack of knowledge and not having a physical activity expert on the team.ConclusionsThe results suggest that strategies are warranted to improve FHT registered dietitians' knowledge, attitude, and counselling skills related to physical activity and sedentary behaviour. This study provides a strong foundation to develop a theory-based, quantitative measure to assess physical activity and sedentary behaviour counselling practices and determinants among registered dietitians.

Project description:BackgroundProducing graduates for a breadth of sectors is a priority for veterinary science programs. Undergraduate career intentions represent de-facto 'outcome' measures of admissions policy and curricula design, as intentions are strong predictors of eventual behaviour. Informed by Ajzen's Theory of Planned Behaviour, this study aimed to identify if contextually relevant attitudes and self-ratings affect student intentions for veterinary career sectors.ResultsSurvey responses from 844 students enrolled in five Australian veterinary programs in 2014 were analysed. Intention was measured for biomedical research/academia, industry, laboratory animal medicine, public health/government/diagnostic laboratory services, mixed practice, intensive animal production, companion animal practice, not work in the veterinary profession, and business/entrepreneurship. Hierarchical multiple linear regression analysis enabled comparison of explanation of variance in intent by demographics, animal handling experience, species preference, and attitudes to aspects of veterinary work. Career sector intentions were highest for mixed or companion animal clinical practice, then business/entrepreneurship, then non-clinical sectors. Overall, intent was explained to a greater extent by species preferences than by animal experience, attitudes to aspects of veterinary work and demographics (with the exception of mixed practice intent) with gender having no significant effect. Several variables exerted negative effects on career intent for less popular career sectors.ConclusionAjzen's Theory of Planned Behaviour (TPB) provides a framework to increase understanding of and predict career sector intentions. Incorporation of attitude and self-efficacy measures in our study revealed preference for species types contributes greatly to career sector intentions for veterinary students, particularly for the more popular practice based sectors. Importantly, specific species preferences and other attitudes can have a negative effect on intent for non-aligned veterinary sectors. Further research is required to identify additional attitudes and/or beliefs to better explain variance in intent for less popular career sectors. Veterinary admissions processes may benefit from utilising the TPB framework. Identified effects revealed by this study may stimulate innovation in marketing, recruitment, admissions and curricular design, such as timing and role modelling, to utilise positive effects and mitigate against negative effects identified for sectors requiring greater representation of career intent in the student body.

Project description:ObjectivesRural-to-urban migrant workers are susceptible to hepatitis B because of lack of self-protection awareness and social support. The aim of this study was to explore the factors influencing risk behaviours for hepatitis B among migrant workers based on the theory of planned behaviour (TPB).DesignA cross-sectional survey.SettingChongqing, China PARTICIPANT: Migrant workers PRIMARY AND SECONDARY OUTCOME MEASURES: The primary outcomes were the TPB variables. The secondary outcomes were factors explored by logistic regressions which were associated with hepatitis B related risk behaviours and behavioural intentions (BI).ResultsOf 1299 recruited migrant workers, 384 (29.56%) participants undertook risk behaviours related to hepatitis B virus infection in the 6 months prior to the survey, and 1111 (85.53%) migrant workers had the BI of doing so. Of 842 migrant workers who undertook sexual activities, 58.19% did not use condoms. Binary logistic regressions showed that migrant workers who were men (p<0.05), less educated (p<0.01), lacked hepatitis B knowledge (p<0.05) and of a young age (p<0.01), were more intent on conducting hepatitis B-related behaviours. Alcohol drinking (p<0.01) was also positively associated with hepatitis B risk. The scores of TPB variables, including attitude towards behaviour and subjective norms, were positively associated with BI when adjusted for sociodemographics (p<0.001). Meanwhile, experience of behaviour and regret feeling were positively associated with BI and actual behaviours (p<0.01 and p<0.05, respectively).ConclusionsA considerable proportion of migrant workers undertake hepatitis B-related risk behaviours, and condoms are seldom used. Health education campaigns targeting the identified TPB variables may play a significant role in improving awareness of hepatitis B prevention among migrant workers, especially for those who are men, younger, alcohol drinkers, less educated and lacking hepatitis B knowledge.

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Predicting sugar-sweetened behaviours with theory of planned behaviour constructs: Outcome and process results from the SIPsmartER behavioural intervention.

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