1997 Report Index

THYROID
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
2.4

16
-
1

11.2

73
-
2


6.8

89
-
3

Total Cases by County
Ada
Adams
Bannock
Bear Lake
Benewah
Bingham
Blaine
Boise
Bonner
Bonneville
Boundary
Butte
Camas
Canyon
Caribou
 29
0
7
0
1
1
2
0
2
9
0
0
1
5
0
Cassia
Clark
Clearwater
Custer
Elmore
Franklin
Fremont
Gem
Gooding
Idaho
Jefferson
Jerome
Kootenai
Latah
Lemhi
 1
0
0
1
0
1
3
1
1
1
1
0
9
2
2
Lewis
Lincoln
Madison
Minidoka
Nez Perce
Oneida
Owyhee
Payette
Power
Shoshone
Teton
Twin Falls
Valley
Washington
Unknown
 0
1
2
1
0
0
2
0
0
0
1
1
0
0

Risk and Associated Factors
Age Though relatively unusual, it is still one of the most common malignancies affecting adolescents and adults up to 50 years of age.
Gender Two-thirds of the cases are among females.
Race & SES* The incidence is higher in Caucasians and in upper income groups.
Hormonal Hormonal factors are believed to contribute to the increased risk in females. This is demonstrated by the sharp increase in incidence among women after menarche.
Other Occupational and environmental exposures to ionizing radiation have been associated with higher rates of thyroid cancer. Radiation exposure to the head and neck in childhood is a well-known risk factor. Family history of thyroid cancer substantially increases the risk. Death due to thyroid cancer under age 40 is rare. Prognosis worsens with each decade of age over 50.
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:
 6.5
3.8-9.2
6.1
2.5-13.5
5.1

There were no cases of thyroid cancer among persons aged less than 15 years. The age-specific incidence rates of thyroid cancer were typically higher for females than males. Health District 7 had significantly more cases than expected based upon rates for the remainder of Idaho (p<0.01).


Stage at Diagnosis

 

* Socio-economic Status