Epidemiologic analysis in school populations as a basis for change in school nursing practice.
D000041:Absenteeism; D003691:Delaware; D003710:Demography; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D012494:Sampling Studies; D012572:School Health Services; D012573:School Nursing; D012959:Socioeconomic Factors