[Health literacy: Definition, assessment tools, state of the art in Europe, health consequences and ways to improve it].

The term "littératie" is derived from the English word "literacy", which refers to knowledge and skills in the fields of reading, writing, speech (or other means of communication) and calculation that allow people to be efficient and integrated into society. Health literacy is a recent concept that relies on the ability to find, understand, evaluate and communicate information in ways that promote, maintain and improve the health of the individual in various settings over the course of life. The objectives of this review are first of all to realize an overview on the health literacy of populations in Europe. Then, we propose to study the link between health literacy and health status (risk behaviors, chronic diseases, morbi-mortality, adherence to care and medical monitoring) and to study its medico-economic impact. We also analyzed the association between personalized therapeutic education and health literacy. Finally, we propose a review of the means put in place in the care system to improve the health literacy of the patients we manage.