educational status human 146 female 123 male 120 Humans 98 adult 98 Article 83 Female 69 Male 69 controlled study 54 Educational Status 51 major clinical study 51 middle aged 47 Adult 45 cross-sectional study 44 questionnaire 40 aged 39 Middle Aged 36 age 34 psychology 34 adolescent 33 child 32 young adult 30 article 28 risk factor 28 Adolescent 27 Aged 26 education 26 Cross-Sectional Studies 24 human experiment 24