BackgroundShort videos on social media are playing an increasingly important role in cancer health education today. It is important to explore how the actual communication effect of health videos and the knowledge absorption of users are influenced by different factors of the video creation process.ObjectiveThe objective of our study is to access the factors influencing breast cancer health education through short videos on efficiency and quality.MethodsThree pairs of videos about breast health were created and participants completed questionnaires before and after watching the videos. A paired t-test was used to analyze within-group change scores. RM-ANOVA was used to assess the relationship between the pretest, posttest, and three variables.ResultsWatching short videos can significantly increase viewers’ knowledge of related health topics (p < 0.05). The viewers’ concentration level while watching was significantly higher for the video with background music (BGM) than for the video without BGM (p = 0.006). The viewers’ willingness to share was significantly higher for the video with a progress bar than for the video without a progress bar (p = 0.02). Using an interpreter wearing a doctor’s uniform instead of casual wear and setting a progress bar can significantly improve the efficiency of knowledge absorption (p < 0.05).ConclusionA uniformed interpreter, BGM and a progress bar are factors influencing the efficiency of short health videos. They can be applied in video making to explore better ways of promoting cancer health education in the new mobile Internet environment.

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AimsTo explore predictors of lymphedema self‐management behaviours among Chinese breast cancer survivors based on the Integrated Theory of Health Behaviour Change, and to clarify the interrelationship among these variables.DesignFurther analysis of a multicentre cross‐sectional and survey‐based study.MethodsA total of 586 participants with breast cancer were recruited from December 2021 to April 2022 in different cities in China. We used self‐reported questionnaires to collect data. Descriptive analysis, bivariate analysis and structural equation model were performed.ResultsThe Integrated Theory of Health Behaviour Change is suitable for predicting lymphedema self‐management behaviours. The final structural model showed good model fit. Social support, self‐efficacy and lymphedema knowledge positively affected lymphedema self‐management behaviours, directly and indirectly. Self‐regulation acted as a crucial mediator between these variables and self‐management. The direct path between social support and self‐regulation was not significant. Lymphedema knowledge and social support also influenced self‐management via illness perception, self‐efficacy and self‐regulation, sequentially. These variables explained 55.9% of the variance in lymphedema self‐management behaviours.ConclusionsThe modified model based on the Integrated Theory of Health Behaviour Change fitted well in predicting lymphedema self‐management behaviours among breast cancer patients. Lymphedema knowledge, illness perception, self‐efficacy, social support and self‐regulation directly and indirectly influenced lymphedema self‐management behaviours.ImpactThis study provides a theoretical basis for the assessment and interventions of lymphedema self‐management behaviours in breast cancer patients. Lymphedema self‐management behaviours should be assessed regularly and comprehensively, taking these predictors into consideration to identify potential barriers. Further research is needed to explore effective interventions integrating these significant predictors.Reporting MethodThis study was reported following Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist for cross‐sectional studies.Patient or Public ContributionNo patient or public contributed to the design or conduct of the study, analysis or interpretation of the data, or in the preparation of the manuscript.What Does This Paper Contribute to the Wider Global Clinical Community?This study focused on identifying and predicting mechanism of self‐management based on a theory of behaviour change. The results can be applied among patients with other chronic diseases or high‐risk populations, and inspire the assessment and interventions facilitating self‐management behaviours.Study RegistrationThis study was registered as an observational study at Chinese Clinical Trial Registry: http://www.chictr.org.cn (ChiCTR2200057084).Implications for the Profession and/or Patient CareFor breast cancer patients with poor lymphedema self‐management behaviour, attention should be raised among nurses and involved healthcare staffs that lymphedema self‐management is multi‐faced. Strategies targeted at improving social support, self‐regulation, knowledge, self‐efficacy and illness perception should be also addressed in lymphedema self‐management programs, to facilitate more effective improvement of lymphedema self‐management behaviours.

Aims and ObjectivesThe purpose of this empirical study was to explore the current status and associated factors of lymphedema self‐management behaviours among Chinese breast cancer survivors.BackgroundBreast cancer‐related lymphedema is a lifetime concern for survivors and is currently incurable. Lifetime lymphedema self‐management takes a significant role in preventing development and progression of lymphedema. Understanding influencing factors of lymphedema self‐management behaviours can help to develop targeted intervention programs.DesignA multicentre cross‐sectional study.MethodsFrom December 2021 to April 2022, a convenience sample of 586 participants were recruited at four tertiary hospitals in four cities in China. Self‐reported questionnaires were used to measure socio‐demographic characteristics, disease‐and treatment‐related characteristics, lymphedema self‐management behaviours, lymphedema knowledge, illness perception, self‐efficacy, self‐regulation and social support. Descriptive analysis, bivariate analysis and hierarchical multiple regression were conducted. This study was registered at Chinese Clinical Trial Registry (ChiCTR2200057084), and was reported followed the STROBE checklist.ResultsBreast cancer survivors reported moderate level of lymphedema self‐management behaviours. Promotion of lymph reflux management was ranked the least performed self‐management behaviours, while the affected limb protection management ranked the most. 36.2% of self‐management behaviours was explained by exercise regularly, level of attention on lymphedema prevention, unclear about the tumour stage (vs. stage I), knowledge, self‐efficacy, emotional illness representation and social support.ConclusionsLymphedema self‐management behaviours of breast cancer survivors was insufficient. Performance of lymphedema self‐management varied with different socio‐demographic characteristics, along with different levels of knowledge, self‐efficacy, perception and social support. All these identified predictors should be reckoned in assessment and intervention of lymphedema self‐management behaviours.Relevance To Clinical PracticeThis study addressed that breast cancer survivors' lymphedema self‐management behaviours should be promoted. Focusing on identified predictors, further lymphedema surveillance, knowledge education or social facilitation programs are recommended to enhance their self‐management performance and adherence.

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