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Age
as a Risk Factor in Breast Cancer
The risk
of developing breast cancer increases with age. The great majority of
breast cancer cases occur in women older than age 50. Cancer changes develop
slowly over time from normal, to premalignant, to cancerous and invasive
stages. For this reason, breast cancer is more common among older women.
AGE-SPECIFIC
PROBABILITIES OF DEVELOPING BREAST CANCER*
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By
the Age of:
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Your
Chances of Developing Breast Cancer Are:
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Percentage
of Women with Chance of Developing Breast Cancer Are:
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25
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1 in
19,608
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0.005%
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|
30
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1 in
2,525
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0.04%
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35
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1 in
622
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0.16%
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40
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1 in
217
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0.46%
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45
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1 in
93
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1.07%
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50
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1 in
50
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2.00%
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55
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1 in
33
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3.03%
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60
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1 in
24
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4.17%
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65
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1 in
17
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5.88%
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|
70
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1 in
14
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7.14%
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75
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1 in
11
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9.09%
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80
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1 in
10
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10.00%
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85
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1 in
9
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11.11%
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Lifetime
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1
in 8 |
12.50%
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*
Data collected from various sources including:
American
Cancer Society, NIH/NCI
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References:
*Albain KS, Allred DC, Clark GM. Breast cancer outcome and predictors
of outcome: are there age differentials? J Natl Cancer Inst Monogr
1994;(16):35-42.
*Block G. Vitamin C, cancer and aging. Age 1993;16(2):55-8.
*Chie W-C, Chen C-F, Lee W-C, Chen C-J, Lin R-S. Age-period-cohort analysis
of breast cancer mortality. Anticancer Res 1995;15(2):511-5.
*Pike MC, Krailo MD, Henderson BE, et al.: 'Hormonal' risk factors, 'breast
tissue age' and the age-incidence of breast cancer. Nature 303(5920):
767-770, 1983.
*Satariano WA, Swanson GM. Racial differences in cancer incidence: the
significance of age-specific patterns. Cancer 1988 Dec 15;62(12):2640-53.
*Tarone RE, Chu KC, Gaudette LA. Birth cohort and calendar period trends
in breast cancer mortality in the United States and Canada. J Natl Cancer
Inst 1997 Feb 5;89(3):251-6.
*Velentgas P, Daling JR. Risk factors for breast cancer in younger women.
J Natl Cancer Inst Monogr 1994;(16):15-24.
*Wells JNB. Purpose in life and breast health behavior in Hispanic and
Anglo women [dissertation]: Denton: Texas Woman's Univ.; 1998. 153 p.
*Wingo PA, Lee NC, Ory HW, Beral V, Peterson HB, Rhodes P. Age-specific
differences in the relationship between oral contraceptive use and breast
cancer. Cancer 1993 Feb 15;71(4 Suppl):1506-17.
*Zhu K. Breast cancer and risk factors among African-American women aged
20-54: a case-control study according to estrogen receptor. Annual
report 1 Sep 96-31 Aug 97. Nashville (TN): Meharry Medical College;
1997 Sep. 89 p. Available from: NTIS, Springfield, VA; DAMD17-96-1-6270.
also
see -> Are
You At Risk For Breast Cancer?
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