The Cancer Burden in Elderly, Chonburi, 1998-2017
Abstract
Background: Thailand is becoming an aging society. Aging is a significant risk factor for developing cancer. the study describes the epidemiology in cancer focusing on the elderly population.
Materials and Methods: New cancer cases, aged 60 years and older, derived from Chonburi population–based cancer registry during 1998 – 2017 were included in this study. All data were verified and entered into the Canreg5 software. The registered cases were followed up to assess vital status and cause of death until the end of 2021. The number, age-standardized incidence rates (ASR) median survival and relative survival rate were calculated. The joinpoint regression model was used to analysis the change in trend.
Results: There were 18,092 new elderly cancer cases, accounted for 48.9% of all cancer patients and new elderly cancer cases increased 48% from the first to second decades. During 2013-2017, the ASR for all cancer sites were 585.4 and 474.6 per 100,000 in male and female, respectively. The leading cancers were liver & biliary tract, colorectum, breast, lung and prostate. Trend of ASR for cancer had increased in first decade and then declined in the latest years. The average annual percent change (AAPC) for twenty years was 0% and -0.3% among male and female, respectively. The incidence rate increased for cancer of colorectum and liver & biliary tract in both sexes, male leukemia, female breast cancer and female thyroid cancer, with annual increase 2-4 percent. The incidences were decrease about 2 percent per year for bladder cancer in both sexes, male lung cancer and female leukemia. The five-year relative survival rate was 18.4%, 29.8% and median survival was 0.7 years, 1.6 years for elderly male and female, respectively.
Conclusions: The number of elderly cancer cases have been increasing, while no change of AAPC. The cancer of colorectum, liver & biliary tract and female breast is the burden in Chonburi. Treatment modalities and palliative care for elderly population are needed.
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