Does the packaging of health information affect the assessment of its reliability? A randomized controlled trial protocol

Abstract

Background Wikipedia is frequently used as a source of health information. However, the quality of its content varies widely across articles. The DISCERN tool is a brief questionnaire developed in 1996 by the Division of Public Health and Primary Health Care of the Institute of Health Sciences of the University of Oxford. They claim it provides users with a valid and reliable way of assessing the quality of written information. However, the DISCERN instrument’s reliability in measuring the quality of online health information, particularly whether or not its scores are affected by reader biases about specific publication sources, has not yet been explored. Methods This study is a double-blind randomized assessment of a Wikipedia article versus a BMJ literature review using a modified version of the DISCERN tool. Participants will include physicians and medical residents from four university campuses in Ontario and British Columbia and will be randomized into one of four study arms. Inferential statistics tests (paired t-test, multi-level ordinal regression, and one-way ANOVA) will be conducted with the data collected from the study. Outcomes The primary outcome of this study will be to determine whether a statistically significant difference in DISCERN scores exists, which could suggest whether or not how health information is packaged influences how it is assessed for quality. Plain Language Summary The internet, and in particular Wikipedia, is an important way for professionals, students and the public to obtain health information. For this reason, the DISCERN tool was developed in 1996 to help users assess the quality of the health information they find. The ability of DISCERN to measure the quality of online health information has been supported with research, but the role of bias has not necessarily been accounted for. Does how the information is packaged influence how the information itself is evaluated? This study will compare the scores assigned to articles in their original format to the same articles in a modified format in order to determine whether the DISCERN tool is able to overcome bias. A significant difference in ratings between original and inverted articles will suggest that the DISCERN tool lacks the ability to overcome bias related to how health information is packaged.