No abstract

Purpose – In recent years, social media have attracted considerable attention. Hence, the purpose of this paper is to conduct a critical literature review of social media research with the aim of developing a conceptual framework to explain how social media applications are supported by various social media tools and technologies and underpinned by a set of personal and social behavior theories or models. Design/methodology/approach – This study adopted a two-stage approach. The first stage involves a critical literature review of academic journals in social media research, followed by the proposal of a conceptual framework that highlights the tools and technologies as well as theories and models that serve as the foundation of social media applications. The second stage involves the use of an actual case to demonstrate how the proposed framework facilitates the development of a social media application for a regional division of an international non-government organization. Findings – The literature review indicated that social media have been applied in diverse business areas with the support of various social media tools and technologies and underpinned by a range of personal and social behavior theories and models. Based upon such findings, a conceptual social media application framework was devised and its usability illustrated via a real-life case study. Managerial implications are also discussed. Research limitations/implications – Social media covers a wide range of research topics and thus, the literature review presented in this study may not be exhaustive. Nevertheless, the proposed framework and case study can both serve as reference for future research and provide recommendations for practitioners in the design and development of their own social media applications. Practical implications – This study not only explains the importance of applying social media in various business sectors, but also enhances the understanding of the infrastructure of social media applications. The study also provides insights for improving the efficiency of application solutions. Organizations are advised to adopt social media in their business based on the proposed conceptual framework. Originality/value – With a literature review of social media research and a real-life case study, this study presents a conceptual framework using extant theories and models to form a foundation for social media applications. The framework extends existing knowledge on the design and development of information systems.

BackgroundThe validity of the 20-item Center for Epidemiological Studies Depression (CES-D) scale for depression screening in Hong Kong Chinese patients with type 2 diabetes remains unknown. We aimed to validate CES-D, compare its psychometric properties with the 9-item Patient Health Questionnaire (PHQ-9), and explore whether one of the two is more suitable for depression screening in Chinese patients with type 2 diabetes.MethodsBetween June 2010 and July 2011, 545 consecutive Chinese patients with type 2 diabetes who underwent structured comprehensive assessments completed the CES-D and PHQ-9. Forty patients were retested within 2–4 weeks by telephone interview and 97 patients were randomly selected to undergo the Mini International Neuropsychiatric Interview (MINI) by psychiatrists for clinical diagnosis of depression.ResultsThe internal consistency (Cronbach’s α) of CES-D was 0.85, with a test-retest correlation coefficient of 0.64. The area under the curve for CES-D compared to the clinical diagnosis of major depression was 0.85. A cut-off score of ≥21 for CES-D provided the optimal balance between sensitivity (78.3 %) and specificity (74.3 %) and identified 17.8 % (n = 97) of patients with depression. CES-D and PHQ-9 showed moderate agreement in depression screening (Cohen’s Kappa: 0.45). Compared to non-depressed patients, those who screened positive by PHQ-9 had a higher HbA1c whereas the glycemic differences were not significant when using CES-D.ConclusionThe CES-D is a valid screening tool for depression in Chinese type 2 diabetic patients although the PHQ-9 was more discriminative in identifying those with suboptimal glycemic control.

MoCA defined cognitive impairment was common at 3 months after aSAH and MoCA correlated with functional outcomes similar, but not superior, to the MMSE. The study is registered at ClinicalTrials.gov of the US National Institutes of Health (NCT01038193).