Study on Age-adjusted Mortality Rate of Patients with Colorectal Cancer in Fujieda City

Abstract

Objective: The mortality rate and population dynamics of colorectal cancer in Fujieda were investigated. Age-adjusted colorectal cancer mortality rates for people under 75 years old were compared between Fujieda and Tokyo.

Methods: The number of colorectal cancer deaths in Fujieda was investigated from 1981 to 2015. We also investigated mortality rate, sex and age for colorectal cancer deaths from 2005 to 2015. The change in the mortality rate with age was observed in ten-year increments. Numbers of deaths and population changes were studied for two age groups: Group a) 40-69 and b) over 70. Age-adjusted mortality rates of colorectal cancer were compared between Fujieda and Tokyo by the direct method.

Results: The number of colorectal deaths from 1981 to 2015 in Fujieda was 920. The colorectal cancer mortality rate was 3% of all fatalities, or 0.02% per population. Colorectal cancer deaths were increasing (p< 0.01). There was no increase in the number of deaths in people under 69 years old from 2005 to 2015 (p< 0.01). Compared with the Tokyo Metropolitan Government age-adjusted mortality rates of colorectal cancer for those under 75 years old, at 5.00 for men and 1.96 for women, there was a tendency for rates in Fujieda City to be lower (vs. 100,000 population).

Conclusion: Mortality from colorectal cancer in Fujieda was increasing as the elderly population increased. In a comparison of the age-adjusted mortality rates of Fujieda and Tokyo, that for Fujieda was lower at 3.34.