article 5 child education female 5 human human experiment 5 male 5 questionnaire Humans 4 major clinical study 4 Child 3 Female 3 Health Knowledge, Attitudes, Practice 3 Male 3 Oral Health 3 attitude to health 3 health 3 Intervention 2 Knowledge 2 School Health Services 2 Surveys and Questionnaires 2 analysis of variance 2 chi square test 2 controlled study 2 decision making 2 mouth hygiene 2 primary school 2 procedures 2 randomized controlled trial 2 school child 2