Trends in invasive cancer of the cervix uteri in New South Wales, 1973-1982.

Data from the New South Wales (NSW) Central Cancer Registry comprising all new cases of, and deaths from, invasive cancer of the cervix uteri registered in persons aged 15 years and over for the 10-year period 1973 to 1982 were examined using log-linear regression to determine whether incidence and mortality had been changing in NSW. Allowing for the estimated fraction of women who had undergone hysterectomy, this cancer had decreased significantly in incidence (-1.3% per year) as well as mortality (-3.6%). There were no significant trends in relation to age at diagnosis, stage at diagnosis or histological type. Overall, younger age at diagnosis was associated with an earlier stage at presentation and there was no evidence for a trend towards more severe disease in young women during the 10-year period. No evidence was found for an increasing incidence of adenocarcinoma. By 1982 the age-standardized incidence rate was 10.4 per 100,000 (12.5 per 100,000 after adjustment for the hysterectomy fraction). Cancer of the cervix uteri was more common in Inner and Western Sydney and less common in the Northern Metropolitan region of Sydney and rural New South Wales.