1998 Report Index

MELANOMA OF THE SKIN
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
12.7

84
45
23
11.1

79
37
10


11.8

163
82
33

Total Cases by County
Ada
Adams
Bannock
Bear Lake
Benewah
Bingham
Blaine
Boise
Bonner
Bonneville
Boundary
Butte
Camas
Canyon
Caribou
 66
0
3
0
7
2
5
1
16
9
3
0
0
18
4
Cassia
Clark
Clearwater
Custer
Elmore
Franklin
Fremont
Gem
Gooding
Idaho
Jefferson
Jerome
Kootenai
Latah
Lemhi
 2
1
0
0
4
6
1
0
4
2
0
3
34
2
3
Lewis
Lincoln
Madison
Minidoka
Nez Perce
Oneida
Owyhee
Payette
Power
Shoshone
Teton
Twin Falls
Valley
Washington
Unknown
 1
2
1
3
4
2
2
4
0
7
0
12
3
2

Risk and Associated Factors
Age Melanoma is extremely uncommon before puberty. Rates increase with age.
Gender It occurs more frequently in males than females.
Race & SES* The incidence rate is highest in Caucasians and is uncommon in African Americans. It has an increased incidence in higher income groups.
Occupation Persons working in occupations associated with increased sun exposure have a higher incidence.
Other Ultra-violet light exposure, especially blistering sunburns during childhood, is a major risk factor. Melanoma has been on the increase nationally for several decades. People with light skin and individuals with numerous or atypical moles are at increased risk.
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
7.1-13.7
8.5
5.9-17.0

14.9

There were no cases of melanoma of the skin among persons less than 15 years of age. The age-specific incidence rates were higher among males after age 54. Incidence rates for melanoma of the skin varied considerably by health district, with Health Districts 2 and 3 having statistically significantly fewer cases than expected based upon rates for the remainder of Idaho (p<0.05), and Health Districts 1 and 4 having statistically significantly more cases than expected (p<0.05).

Stage at Diagnosis