Background: Empirical research has demonstrated that people frequently use social media for gathering and sharing online health information. Health literacy, social media use, and self-efficacy are important factors that may influence people’s health behaviors online. Objective: We aimed to examine the associations between health literacy, health-related social media use, self-efficacy, and health behavioral intentions online. Methods: We conducted a cross-sectional survey of adults 18 years and older (n=449) to examine predictors of health-related behavioral intentions online including health literacy, social media use, and self-efficacy in China using 2 moderated mediation models. Mediation and moderation analyses were conducted. Results: Self-efficacy mediated the effects of health literacy (Bindirect=0.213, 95% CI 0.101 to 0.339) and social media use (Bindirect=0.023, 95% CI 0.008 to 0.045) on health behavioral intentions on social media. Age moderated the effects of health literacy on self-efficacy (P=.03), while previous experience moderated the effects of social media use on self-efficacy (P<.001). Conclusions: Health literacy and health-related social media use influenced health behavioral intentions on social media via their prior effects on self-efficacy. The association between health literacy and self-efficacy was stronger among younger respondents, whereas the association between health-related social media use and self-efficacy was stronger among those who previously had positive experiences with health information on social media. Health practitioners should target self-efficacy among older populations and increase positive media experience related to health.

The coronavirus disease (COVID-19) broke out in China in January 2020 and has been effectively controlled in April 2020 after China’s relentless efforts. People’s engagement in disease-related preventive behaviors is crucial in containing such infectious disease. Vulnerable populations often have higher chances of developing severe illness from COVID-19 and the mortality rate is also higher. Thus, at-risk populations for COVID-19 request extra attention. The current study conducted a national online survey among vulnerable populations in China in early February 2020 to examine their engagement in coronavirus-related preventive health behaviors (e.g., frequent handwashing) and the potential determinants including factors from the Health Belief Model, trust in different media sources, and health literacy. The results suggested that the vulnerable populations’ engagement in coronavirus-related preventive behaviors were significantly associated with barriers, benefits, self-efficacy, trust in doctors’ social media, and trust in TV for COVID-19-related information. Besides, barriers, benefits, self-efficacy, trust in doctors’ social media, and trust in TV mediated the effects of health literacy on preventive behaviors. Our findings provided directions for future health promotions and interventions targeting vulnerable populations to enhance their preventive behaviors in China.

Cancer survivors’ emotional well-being is an integral part of their overall health and may influence their recovery and survival. The current study used the 2018 Health Information National Trends Survey (HINTS) 5 Cycle 2 (N = 593) to evaluate the determinants of cancer survivors’ emotional well-being. Internet cancer information seeking, social support, patient-centered communication, cancer beliefs, and self-efficacy to take care of one’s health were examined as factors to be associated with cancer survivors’ emotional well-being using structural equation modeling. Social support, cancer beliefs, and self-efficacy to take care of one’s health were found to be significantly associated with emotional well-being among cancer survivors. Cancer beliefs mediated the associations of cancer information seeking using the Internet, social support, and patient-centered communication with cancer survivors’ emotional well-being while health self-efficacy mediated the associations of social support and patient-centered communication with cancer survivors’ emotional well-being. It is important for health practitioners to focus on improving social support, self-efficacy for managing health, and cancer-related beliefs in order to enhance the emotional well-being of cancer survivors.

Background: Since January 2020, the coronavirus disease (COVID-19) swept over China and then the world, causing a global public health crisis. People’s adoption of preventive and intervening behaviors is critical in curbing the spread of the virus. Objective: The aim of this study is to evaluate Chinese people’s adoption of health behaviors in responding to COVID-19 and to identify key determinants for their engagement. Methods: An anonymous online questionnaire was distributed in early February 2020 among Mainland Chinese (18 years or older) to examine their engagement in preventive behaviors (eg, frequent handwashing, wearing masks, staying at home) and intervening behaviors (eg, advising family to wash hands frequently), and to explore potential determinants for their adoption of these health behaviors. Results: Out of 2949 participants, 55.3% (n=1629) reported frequent engagement in preventive health behaviors, and over 84% (n=2493) performed at least one intervening health behavior. Greater engagement in preventive behaviors was found among participants who received higher education, were married, reported fewer barriers and greater benefits of engagement, reported greater self-efficacy and emotional support, had greater patient-centered communication before, had a greater media literacy level, and had greater new media and traditional media use for COVID-19 news. Greater engagement in intervening behaviors was observed among participants who were married, had lower income, reported greater benefits of health behaviors, had greater patient-centered communication before, had a lower media literacy level, and had a greater new media and traditional media use for COVID-19 news. Conclusions: Participants’ engagement in coronavirus-related preventive and intervening behaviors was overall high, and the associations varied across demographic and psychosocial variables. Hence, customized health interventions that address the determinants for health behaviors are needed to improve people’s adherence to coronavirus-related behavior guidelines.

• A considerable number of digital interventions for skin cancer prevention have been evaluated. • Most skin cancer digital interventions focus on sun protection-related outcomes. • Most interventions use web-based digital technology (websites, webpages, mobile apps) rather than videos, emails or text messages alone as the delivery platform. • Multi-component digital interventions are effective in promoting sun protection and skin self-examination. • Almost all studies found digital interventions to be equally or more effective compared to non-digital interventions.

Background: Approximately 42.5 million adults have been affected by mental illness in the United States in 2013, and 173 million people have been affected by a diagnosable psychiatric disorder in China. An increasing number of people tend to seek health information on the Web, and it is important to understand the factors associated with individuals’ mental health information seeking. Identifying factors associated with mental health information seeking may influence the disease progression of potential patients. Objective: This study aimed to test the planned risk information seeking model (PRISM) in China and the United States with a chronic disease, mental illness, and two additional factors, ie, media use and cultural identity, among college students. Methods: Data were collected in both countries using the same online survey through a survey management program (Qualtrics). In China, college instructors distributed the survey link among university students, and it was also posted on a leading social media site called Sina Weibo. In the United States, the data were collected in a college-wide survey pool in a large Northwestern university. Results: The final sample size was 235 for the Chinese sample and 241 for the US sample. Media use was significantly associated with mental health information–seeking intentions in the Chinese sample (P<.001), and cultural identity was significantly associated with intentions in both samples (China: P=.02; United States: P<.001). The extended PRISM had a better model fit than the original PRISM. Conclusions: Cultural identity and media use should be considered when evaluating the process of mental health information seeking or when designing interventions to address mental health information seeking.