1998 Report Index

LIVER
Incidence and Mortality Summary
Male Female Total
Age-adjusted incidence
rate per 100,000

# of new invasive cases
# of new in-situ cases
# of deaths
3.9

24
0
18
2.0

16
0
15


2.9

40
0
33

Total Cases by County
Ada
Adams
Bannock
Bear Lake
Benewah
Bingham
Blaine
Boise
Bonner
Bonneville
Boundary
Butte
Camas
Canyon
Caribou
 11
1
4
0
0
0
1
1
2
2
0
0
0
6
0
Cassia
Clark
Clearwater
Custer
Elmore
Franklin
Fremont
Gem
Gooding
Idaho
Jefferson
Jerome
Kootenai
Latah
Lemhi
 0
0
0
0
0
0
1
0
1
1
0
0
3
0
0
Lewis
Lincoln
Madison
Minidoka
Nez Perce
Oneida
Owyhee
Payette
Power
Shoshone
Teton
Twin Falls
Valley
Washington
Unknown
 0
0
0
0
0
0
0
1
0
0
1
4
0
0

Risk and Associated Factors
Age The incidence rate of liver cancer increases with age.
Gender Rates are usually higher in males than in females.
Race Incidence is higher in Asians and African Americans than for the rest of the population.
Diet Aflatoxin, which is present in certain foods such as peanut butter, has been implicated as a potential risk factor.
Occupation Exposure to vinyl chloride used in plastic production is associated with an increased risk of angiosarcoma of the liver.
Other Cigarette smoking increases the risk. Hepatitis B and Hepatitis C infections are significant causes of hepatocellular carcinoma. Cirrhosis of the liver due to viral hepatitis, alcoholism, or toxic chemical exposures accounts for 50-80% of patients diagnosed with liver cancer.
Special Notes
Mean age-adjusted incidence rate across health districts:
95% confidence interval on the mean age-adjusted incidence rate:
Median age-adjusted incidence rate of health districts:
Range of age-adjusted incidence rate for health districts:
SEER rate (1991-1995): 		10.4
1.8-3.5
2.8
0.4-4.3
3.0

There were no cases of liver cancer among persons less than 45 years of age. Age-specific incidence rates increased with age, peaking in the age group 75-79 for males and 80-84 for females. No health district had significantly more cases than expected based upon rates for the remainder of Idaho.

Stage at Diagnosis