Trust in Mass Media as Sources of Cancer Information: Findings from a Nationally Representative Cross-Sectional Survey in Japan.

Trust is a major factor in effective public dissemination and use of relevant health information to guide important health decisions. To examine mass media as a communication channel for delivering cancer information among Japanese adults, we identified the level of trust in various types of mass media as sources of cancer information, and examined factors associated with trust, including exposure to mass media, sociodemographic factors, and cancer history. Data were analyzed for 3,109 Japanese adults who responded to a nationally representative cross-sectional mail survey. Data included trust in cancer information sources, sociodemographic variables, cancer history, and exposure to mass media. Logistic regression analysis was used. The prevalence of high trust in cancer information sources was highest for physicians (94.7%). Among mass media, Internet (47.2%) was the most trusted source of cancer-related information, followed by television (44.3%), newspapers/magazines (42.7%), and radio (32.7%). The high-exposure group for newspapers (AOR = 1.28, 95%CI = 1.07-1.54) was more likely to trust newspapers. Similarly, high-exposure groups for radio (1.22, 1.02-1.45), Internet (1.21, 1.01-1.45), and television (1.30, 1.10-1.53) were positively associated with trust in each media type. Although trust in mass media was lower than trust in physicians, the study found that a large group of respondents had high levels of trust in mass media sources. Trust in cancer information from each mass media type was mainly related to the level of exposure to each mass media type. Developing health communication strategies using mass media may be effective for disseminating relevant cancer information in Japan.