Nutrition knowledge, diet quality and orthorexic behaviors in Polish students – a pre-post repeated cross-sectional study

Database from the study titled: "Nutrition knowledge, diet quality and orthorexic behaviors in Polish students – a pre-post repeated cross-sectional study". This study is a part of the research project titled "Assessment of the prevalence of orthorexia nervosa symptoms among young people in terms of nutrition, health, psychosocial and methodological aspects".