An Attempt to Estimate the Incidence of Cervical Dysplasia in a Group of New Zealand Women Using Contraception

According to the authors' abstract of an article published in Epidemiology, "We attempted to estimate incidence rates of cervical dysplasia and carcinoma in a cohort of 7,199 New Zealand women using contraception. The cohort was followed prospectively with periodic cervical smears, intended to be annual, over a 6-year period. The principal outcome investigated was a diagnosis of cervical dysplasia of any degree, from mild to severe dysplasia and including carcinoma in situ or invasive carcinoma, made cytologically by a central study laboratory and confirmed by histology or deoxyribonucleic acid (DNA) evaluation. These diagnoses are jointly referred to as 'dysplasia.' Two successive...

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