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Indicator Report - Breast Cancer - Mammography

Why Is This Important?

Breast cancer is the most commonly occurring cancer in U.S. women (excluding basal and squamous cell skin cancers) and the leading cause of female cancer death in Utah. Deaths from breast cancer can be substantially reduced if the tumor is discovered at an early stage. Mammography is currently the best method for detecting cancer early. Clinical trials have demonstrated that routine screening with mammography can reduce breast cancer deaths by 20% to 30% in women aged 50 to 69 years, and by about 17% in women aged 40 to 49 years.

The U.S. Preventive Services Task Force recommends that women 50-74 years of age undergo mammography every one to two years, while the American Cancer Society recommends that women aged 40 or older have an annual mammogram. Women who are at higher than average risk of breast cancer should seek expert medical advice about whether they should begin screening before age 40 and the frequency of that screening.

If you are 40 or over, talk to your doctor about which recommendations are best for you.

Mammogram Within the Past Two Years, Utah and U.S., 1989-2013

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Data Notes

Age-adjusted to U.S. 2000 standard population.

Data provided for all years available.

Old Methodology: Previous BRFSS methodology used "post-stratification" which was used to weight data by age, gender, and local health district (LHD).

New Methodology: To reduce bias and more accurately represent population data, the BRFSS has changed survey methodology. It began conducting surveys by cellular phone in addition to landline phones. It also adopted "iterative proportional fitting" (raking) as its weighting method. With raking, education, race/ethnicity, marital status, home ownership/renter, and telephone source are included in the weighting procedure.

Data Sources

Utah Data: Behavioral Risk Factor Surveillance System, Office of Public Health Assessment, Utah Department of Health. U.S. Data: Behavioral Risk Factor Surveillance System (BRFSS), Division of Behavioral Surveillance, CDC Office of Surveillance, Epidemiology, and Laboratory Services.

Other Views


The proportion of women 40 years or older who reported having a mammogram in the last two years.

How We Calculated the Rates

Numerator: The number of women 40 years or older who reported having a mammogram in the last two years.
Denominator: The total number of female survey respondents aged 40 or older excluding those who responded "don't know" or "refused" to the numerator question.

Page Content Updated On 11/03/2014, Published on 12/02/2014
The information provided above is from the Utah Department of Health's Center for Health Data IBIS-PH web site ( The information published on this website may be reproduced without permission. Please use the following citation: "Retrieved Wed, 27 May 2015 5:40:47 from Utah Department of Health, Center for Health Data, Indicator-Based Information System for Public Health Web site:".

Content updated: Tue, 2 Dec 2014 10:43:16 MST