Trends in breast cancer incidence and mortality in Denmark, 1943–1982

✍ Scribed by Marianne Ewertz; Bendix Carstensen

• Publisher: John Wiley and Sons
• Year: 1988
• Tongue: French
• Weight: 501 KB
• Volume: 41
• Category: Article
• ISSN: 0020-7136
• DOI: 10.1002/ijc.2910410110

✦ Synopsis

The trend in breast cancer incidence and mortality was groups and time periods of diagnosis (Table I). The marginal examined using data from the Danish Cancer Registry and totals represent crude age-and time-specific rates. Synthetic the national mortality statistics respectively. The study POP-birth cohorts were constructed by combining 5-year age-and ulation comprised 65,870 incident cases and 33.817 deaths 'Tom calendar-time periods, illustrated by the step curve in Table I. breast cancer in Denmark between 1943 and 1982. The m idence rate remained almost up to around 1960, To describe the time trend in the age-specific incidence rates, whereafter it steadily.

Comparatively little change was we applied statistical models estimating the separate effects of observed in mortality. Possible explanations for the differing age, calendar time and birth cohort. These models are extrends in incidence and mortality include under-reporting of plained in further detail in the Appendix. It was assumed that breast cancer from death certificates and improvement in the number of cases in any given age-, calendar-time, and survival. A multivariate statistical analysis showed that the birth-cohort group was a Poisson random variable, indepenincrease in incidence was due mostly to a cohort effect, though dent of the number of cases in the other groups (McCullagh calendar time may have had a slight effect as well.