The use of hearing aids in the Northern Region.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001294:Attitude to Health; D002648:Child; D002675:Child, Preschool; D005260:Female; D005382:Financing, Personal; D006306:Health Surveys; D006310:Hearing Aids; D006801:Humans; D008297:Male; D008875:Middle Aged; D012606:Scotland; D012737:Sex Factors