This scoping review aimed to clarify and redefine the concepts of social and physical presence in the context of online livestreaming environments. Physical presence involves technical elements and nonhuman-to-human interaction, factors that inevitably influence social presence, which has human-to-human interactions at its core. Considering one type of presence to the exclusion of the other may not provide sufficiently informed decisions for user consumption. However, most previous studies have only studied either physical or social presence factors; few have systematically examined both to explain their influence. This review examined how the factors under these two presence influenced users' consumption decision-making process in TikTok live-stream retail purchases by synthesizing 60 studies conducted from 2019 to 2023 using Arksey and O'Malley's 5-step framework. Evidence of the specific attributes by which presence affects users' consumption decisions was elicited and reorganized. Using the preferred reporting items for systematic reviews and meta-analyses (PRISMA) framework for scoping review and guided by the joanna briggs institute (JBI) methodological guidelines, the results reveal that out of the 60 studies, 36 were influenced by social presence and 24 by physical presence. When livestreaming online, social presence tends to include the user and anchor perspectives, which prompts users to make consumption decisions. However, online physical presence includes products, technology, and scenes as its main dimensions, and users make consumption decisions through perceptual control. This review clarifies new media livestreaming communication and the key factors influencing users' consumption decision-making systems. It also suggests that integrating online social and physical presence in future research will yield a better understanding of livestreaming purchase decisions.
Myocardial infarction (MI) commonly known as "heart attack" results from the blockage of blood flow to the heart. Postmenopausal women face an elevated risk of MI due to declining estrogen levels, a hormone pivotal in maintaining cardiovascular health. It promotes vasodilation, reduce inflammation, and improves lipid profiles. While estrogen therapy shows promise in mitigating MI risk for postmenopausal woman, its efficacy in prevention and recovery remains a subject of debate. This review provides a critical assessment of existing evidence on estrogen therapy's cardioprotective effects for postmenopausal women. It delves into estrogen's role in vascular function enhancement, inflammation reduction, and lipid metabolism modulation. Additionally, it addresses the various forms of estrogen therapy, administration methods, dosage considerations, safety implications, and associated risks. The review highlights the existing controversies and knowledge gaps related to estrogen therapy for MI prevention. It underscores the urgency for in-depth research to decipher the nexus between estrogen therapy and MI risk, especially concerning primary prevention and specific postmenopausal subgroups. Future studies should investigate optimal formulations, doses, and administration routes of estrogen therapy as well as assess treatment timing and duration. Comparative studies and long-term follow-up are necessary to inform clinical decision-making and improve patient care. Addressing these research gaps will empower clinicians to make more judicious choices about estrogen therapy for MI prevention and recovery in postmenopausal women, aiming for enhanced patient outcomes.