Abstract:
The purpose of this research is to calculate the net premium for colorectal cancer insurance rider according the 4 stages of cancer. Data used in this research are the mean annual age-standardized incidence rate of colorectal cancer from Thailands National Cancer Institute, 5-year survival rate and ratio of cancer patient in each stage from research about colorectal patient in Thailands population. For Thailand general populations death rate, this research uses Thai Mortality Ordinary 2017 issued by the Office of Insurance Commission of Thailand. For the calculation of the related probabilities, this research uses multistate model and Markov chain process. The calculation of net premium uses the principle of equivalent value of actuarial present value according to the example rider which are detailed in two cases. First case is the equal benefit of 1,000,000 units paid for diagnosis of or death from colorectal cancer for all stage of the cancer. Second case is the tiered benefit paid for diagnosis of or death from colorectal cancer with the diagnosis of or death from the cancer stage Is benefit is 1,000,000 units and ratio for the benefit covering the diagnosis of the cancer stage II, III, and IV is 2, 3, and 4 times the benefit for the stage I. The rider coverage and payment time is 5 years for both case. The interest rate is 4 percent per year and constant throughout the coverage period. The results show the net premium increases as the age of the insured increases. According to the benefit for the first case, the net premium is between 56.28 and 1451.45 baht for the male insured and between 33.11 and 1027.95 baht for the female insured. According to the benefit for the second case , the net premium is between 173.02 and 4487.95 baht for the male insured and between 101.85 and 3175.32 baht for the female insured. The net premium for the male insured is higher than the net premium for the female insured disproportionally throughout the age in both cases. The net premium according to the rider in the second case is higher than the net premium according to the rider in the first case for both genders and all age. Comparing the net premium of the rider to the net premium of the life insurance with benefit of 1,000,000 baht covering all cause of death with the same coverage time and payment time of 5 years and the same constant interest rate show that the net premium for the rider in the first case is approximately 3.48-7.37 percent of the 5-year temporary life insurance's net premium for the male insured and approximately 4.09-12.83 percent of the life 5-year temporary life insurance's net premium for the female insured. Meanwhile, the net premium for the rider in the second case is approximately 10.71-22.70 percent of the 5-year temporary life life insurance's net premium for the male insured and approximately 12.63-39.50 percent of the 5-year temporary life life insurance's net premium for the female insured.