Incidence of Cancer of the Liver and Intrahepatic Bile Duct by County, New Mexico, 2017-2021
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Incidence of Cancer of the Liver and Intrahepatic Bile Duct by County, New Mexico, 2017-2021
Why Is This Important?
Primary liver cancer (cancer that starts in the liver) accounts for over 2% of all new cancer cases and 5% of all cancer deaths in the U.S, which represents approximately 41,260 cases and 30,520 deaths. The five-year survival rate is 21%. Disease risk among males is about 3 times higher than that in females, reflecting a gender difference in risk factors that include alcohol abuse, chronic infection with hepatitis B virus (HBV) or hepatitis C virus (HCV), exposure to aflatoxin, and obesity. HBV and HCV can be spread from person to person through sharing contaminated needles (such as in drug use) or unprotected sex. Given these major risk factors, many cases of liver cancer are considered to be preventable.
Definition
Liver and intrahepatic bile duct cancer incidence refers to the number of persons newly diagnosed with liver and intrahepatic bile duct cancer during a specified time period. Measures include 1) the number of newly diagnosed cases of the liver and intrahepatic bile duct cancer; and 2) age-adjusted incidence rate of liver and intrahepatic bile duct cancer (adjusted by the direct method to the 2000 US standard population. All rates are expressed per 100,000 persons.
Data Notes
Rates have been age-adjusted using the direct method and the 2000 U.S. standard population.Data Sources
- New Mexico Population Estimates: University of New Mexico, Geospatial and Population Studies (GPS) Program.
(http://gps.unm.edu/) - New Mexico Tumor Registry
(https://nmtrweb.unm.edu/)
How the Measure is Calculated
Numerator:
The number of liver and intrahepatic bile duct cancer cases newly diagnosed in New Mexico residents within a specified time period. The data are based on the National Cancer Institute's Surveillance, Epidemiology, and End Results (SEER) program incidence site recode for liver cancer (SEER Recode B 21071, 21072); ICD-O-3 codes: primary sites C220, C221; excludes histologies: 9590-9989, and 9140; Malignant cases: ICD behavior code 3.Denominator:
The estimated population of New Mexico residents within a specified time period.
Data Issues
New Mexico Population Estimates
All population estimates apply to July 1 of the selected year. These estimates are considered the most accurate estimates for the state of New Mexico and should match those found on the University of New Mexico Geospatial and Population Studies website. Estimates include decimal fractions. Census tract population estimates were summed to produce County and Small Area population estimates. Population estimate totals may vary due to rounding. Population estimates for previous years are occasionally revised as new information becomes available. When publishing trend data, always be sure that your rates for earlier years match current rates on NM-IBIS that have been calculated with the most up-to-date population estimates.
New Mexico Tumor Registry
In agreement with the New Mexico Tumor Registry, to ensure confidentiality the count of cancer cases is suppressed for any given county if the count is between one and four and the population is less than 1,000. NOTE: The COVID-19 pandemic disrupted health services, leading to delays and reductions in cancer screening, diagnosis, and reporting to some central cancer registries. This may have contributed to an observed decline in 2020 incidence for most cancer sites.