Humans 5 attitude to health controlled study human 5 major clinical study Female 4 child 4 female 4 male 4 Child 3 Health Knowledge, Attitudes, Practice 3 Male 3 adult 3 article 3 human experiment 3 procedures 3 questionnaire 3 school child 3 Adult 2 Article 2 Caucasian 2 Health Promotion 2 Hispanic 2 Interviews as Topic 2 Oral Health 2 School Health Services 2 Schools 2 Surveys and Questionnaires 2 analysis of variance 2 clinical assessment 2