Table 1.

Main categories and subcategories defined in the present study.

Categories	Subcategories
Filter strategies of health misinformation	Origin of health information	Authentication of users
	Check the internal reliability
	Elements to check the external reliability	Tone of messages Presence or absence of data to support the affirmation about health. Presence of links to scientific or technical documents
Check the reliability of scientific papers linked to health information messages	Health literacy competence	Auto perception of high or low competence on health literacy
	Critical lecture competence	Analyzed the methodology and data analysis used Check reliability using, exclusively, clinical experience (no application of methodology research or data analysis competencies)
Reply to health misinformation messages	Frequency of reply
	Tone and (kind of) language used	Technical/non-technical
	Rebuttal misinformation	Publicly or privately
	Inclusion of scientific references in the replies