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BREAST
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Incidence and Mortality Summary |
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| Male | Female | Total | |||
| Age-adjusted incidence rate per 100,000 # of new invasive cases # of new in-situ cases # of deaths |
0.9 6 1 1 |
109.5 753 125 158 |
57.7 |
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Total Cases by County |
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| Ada Adams Bannock Bear Lake Benewah Bingham Blaine Boise Bonner Bonneville Boundary Butte Camas Canyon Caribou |
191 7 47 1 7 26 8 7 23 58 15 1 0 79 1 |
Cassia Clark Clearwater Custer Elmore Franklin Fremont Gem Gooding Idaho Jefferson Jerome Kootenai Latah Lemhi |
20 1 10 2 14 5 6 11 14 11 12 10 86 20 7 |
Lewis Lincoln Madison Minidoka Nez Perce Oneida Owyhee Payette Power Shoshone Teton Twin Falls Valley Washington Unknown |
6 |
| Age | Rates increase steadily with age. Age is the single most important risk factor for breast cancer. A 60-year old white American woman's risk of developing breast cancer is fourteen times that of a 30-year old American woman. |
| Genetics | Specific genes associated with breast cancers have been identified and are being studied. |
| Race & SES* | Caucasians have higher incidence rates as do women in higher income groups. |
| Hormonal | There is evidence of hormonal influence in the risk of developing breast cancer. Longer intervals of menarche to the first full-term pregnancy and menarche to menopause, as well as menarche before age 13, have been associated with higher risks of breast cancer. |
| Other | High dietary fat intake, obesity, sedentary life-style, and having a mother or sister with breast cancer have all been implicated as associated risk factors. |
| Mean age-adjusted incidence rate (female)
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): |
108.6 97.5-119.8 103.4 90.3-133.3 110.9 |
The vast majority of breast cancer cases occur among females. In 1997 in Idaho, there were six cases of invasive breast cancer among males. The age-specific incidence rates of female breast cancer in Idaho in 1997 increased with age, peaking in the age group 70-74. No cases were observed in women less than 20 years of age. No health districts had significantly more cases than expected based upon rates for the remainder of Idaho.
