1998 Report Index

LEUKEMIA
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
14.6

92
0
60
7.5

54
0
43


10.9

146
0
103

Total Cases by County
Ada
Adams
Bannock
Bear Lake
Benewah
Bingham
Blaine
Boise
Bonner
Bonneville
Boundary
Butte
Camas
Canyon
Caribou
 28
1
7
3
1
1
2
0
5
11
0
1
1
19
1
Cassia
Clark
Clearwater
Custer
Elmore
Franklin
Fremont
Gem
Gooding
Idaho
Jefferson
Jerome
Kootenai
Latah
Lemhi
 0
0
0
0
3
2
2
4
4
2
3
4
20
0
1
Lewis
Lincoln
Madison
Minidoka
Nez Perce
Oneida
Owyhee
Payette
Power
Shoshone
Teton
Twin Falls
Valley
Washington
Unknown
 0
1
0
3
5
0
0
3
1
0
0
4
2
1

Risk and Associated Factors
Age This is the most common form of cancer in children. Incidence usually increases with age in adults. The highest rates occur in individuals over age 60.
Gender Males have a higher incidence than females for chronic myelogenous leukemia (CML), acute lymphoblastic leukemia (ALL), and chronic lymphocytic leukemia (CLL).
Race ALL is less common among African Americans. CLL is rare in Asians.
Genetics Certain congenital defects such as trisomy 21, Fanconi's anemia, Bloom syndrome, and ataxia-telangectasia, increase risk in children for various types of leukemia.
Occupation Exposure to benzene is known to increase the risk for acute myelogenous leukemia (AML).
Other Ionizing radiation exposure increases the risk. Environmental exposure to low frequency, non-ionizing radiation and its association with leukemia incidence is being investigated.
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
8.6-12.2
10.1
5.9-13.0
10.6

The age-specific incidence distribution of leukemia for Idaho is quite similar to the typical pattern described by the SEER program of the National Cancer Institute. The rates are higher for males than females for all types of leukemia with the exception of acute myelogenous leukemia (AML), which has no predilection for age or sex. Generally, the incidence of leukemia is higher in older age groups. No health district had significantly more cases than expected based upon rates for the remainder of Idaho.

Stage at Diagnosis