Adolescent 34 Adolescent psychology 14 Psychological aspects 7 Adolescence 5 Obesity 5 Self-perception in adolescence 5 Stress in adolescence 5 epidemiology 5 Attitudes 4 High school students 4 Self-esteem in adolescence 4 Adolescent Behavior 3 Aggressiveness in adolescence 3 Body Mass Index 3 Body Weight 3 Mental Disorders 3 Mental Health 3 Methodology 3 Parenting 3 Pregnancy in Adolescence 3 Psychology 3 Religious aspects 3 Smoking 3 Students 3 Study and teaching (Secondary) 3 Teenagers 3 in adolescence 3 statistics & numerical data 3 Academic achievement 2 Adjustment (Psychology) in adolescence 2