Variables influencing the sources, frequency and intensity of worry in secondary school pupils.
D000293:Adolescent; D000367:Age Factors; D001007:Anxiety; D002648:Child; D004467:Economics; D004739:England; D005190:Family; D005260:Female; D006262:Health; D006801:Humans; D007092:Imagination; D007398:Interpersonal Relations; D008297:Male; D012574:Schools; D012649:Self Concept; D012737:Sex Factors; D013334:Students; D011795:Surveys and Questionnaires