DefinitionRate of newly reported cases of bladder cancer per 100,000 population.
NumeratorNumber of newly reported cases of malignant bladder cancer for a specific time period.
DenominatorMid-year resident population for a specific time period.
Data Interpretation IssuesBladder cancer includes in situ cases with malignancy. Mortality rates may vary from source to source. This may be due to using provisional data or using different population databases. The cancer mortality rates provided by the [http://dhss.alaska.gov/dph/chronic/pages/cancer/registry.aspx Alaska Cancer Registry] use population estimates provided by the [http://seer.cancer.gov/ Surveillance, Epidemiology, and End Results Program (SEER)] of the [http://www.cancer.gov/ National Cancer Institute]. In contrast, [http://dhss.alaska.gov/dph/VitalStats/Pages/data/default.aspx Alaska Vital Statistics] uses [http://live.laborstats.alaska.gov/pop/index.cfm population estimates] provided by the State Demographer in the [http://laborstats.alaska.gov/ Research and Analysis Section] of the [http://labor.alaska.gov/ Alaska Department of Labor and Workforce Development].
Why Is This Important?It is estimated that in the United States in 2018, 81,190 cases of bladder cancer will be diagnosed. The risk of men developing bladder cancer is about 1 in 27, while for women it is 1 in 89. Nine out of 10 people with bladder cancer are over the age of 55.^1^
Smoking is the most important risk factor for bladder cancer. Smokers are at least 3 times as likely to get bladder cancer as nonsmokers. Smoking is associated with about half of the bladder cancers in both men and women. Studies have found the following additional factors increase your risk of developing bladder cancer: being older than 55, being male, being White, and having a family history of bladder cancer. Exposure to workplace environments with certain industrial chemicals also increase your risk, such as makers of rubber, leather, and textiles, metal workers, machinists, printers, painters, hairdressers (due to hair dyes), and truck drivers (due to diesel fumes).^2^
Incidence rates tell us about the rate at which new cases of a condition occur. As such, the incidence rate of bladder cancer is an important indicator of the burden of this type of cancer in Alaska, allowing us to monitor how this burden changes over time and also to compare this burden among sub-populations. [[br]]
1. American Cancer Society. [http://www.cancer.org/cancer/bladdercancer/detailedguide/bladder-cancer-key-statistics What are the key statistics about bladder cancer?] [[br]]
2. American Cancer Society. [http://www.cancer.org/cancer/bladdercancer/detailedguide/bladder-cancer-risk-factors What are the risk factors for bladder cancer?]
How Are We Doing?Bladder cancer in Alaska was ranked #5 for the number of incidence cases in the time period of 2011-2015.
In Alaska, bladder cancer incidence rates for men are consistently higher than for women, and men are about 3.5 times more likely to develop the disease. In 2015, the bladder cancer incidence rate for men was 39.5 per 100,000 males, compared to the rate for women of 10.4 per 100,000 females.
For the period of 1996-2015, the incidence of bladder cancer ranged from a high of 34.4 per 100,000 population in Ketchikan Gateway Borough to a low of 8.6 per 100,000 population in Bethel Census Area, compared to the statewide rate of 23.0. There were several boroughs/census areas where rates were not calculated because they had less than 6 cases.
By race for 1996-2015, Whites had a higher incidence rate of bladder cancer than any other race at 26.0 per 100,000 people, compared to 15.2 for Blacks, 12.7 for Alaska Natives, and 10.4 for Asians/Pacific Islanders.
How Do We Compare With the U.S.?Alaska has had consistently higher rates of bladder cancer than the U.S. In 2015, Alaska's bladder cancer incidence rate was 24.1 per 100,000 population compared with the U.S. rate of 19.7 per 100,000 population.