1998 Report Index

LARNYX
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
4.0

25
3
9

0.6

4
2
2


2.2

29
5
11

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

Risk and Associated Factors
Age Rates increase with age, with the vast majority of cases occuring after age 55.
Gender Much more common in males than females
Diet Diets low in fresh fruits and vegetables may increase the risk.
Race & SES* Generally in the United States, African Americans have higher incidence rates than Caucasians. Lower income groups experience higher rates.
Occupation Laryngeal cancer has been associated with exposures such as asbestos and wood dust.
Other Cigarette smoking and alcohol use are both major risk factors. The combination of alcohol consumption and tobacco use (smoking or spit tobacco) acts greatly to increase the risk. A patient with a single laryngeal cancer who continues to smoke and drink alcohol has an enhanced risk of developing a second laryngeal tumor.
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): 		2.0
0.9-3.1
2.8
0.0-3.5
3.9

There were no cases of laryngeal cancer among persons less than 25 years of age. The age-specific incidence rates for males were more than twice those for females in most age groups. The highest incidence rate among males was in the age group 70-74. The highest incidence rate among females was in the age group 75-79. Health District 6 had statistically significantly fewer cases than expected based upon rates for the remainder of Idaho (p<0.05).

Stage at Diagnosis