What is the sensitivity and specificity of mammography?

What is the sensitivity and specificity of mammography?

Our data confirmed that digital mammography is a highly accurate tool for breast cancer detection having a sensitivity of 97%, a specificity of 64.5%, a positive predictive value of 89%, and a negative predictive value of 90.9%, with a diagnostic accuracy of 89.3%.

What is the sensitivity of a mammogram?

The sensitivity of mammography ranges from approximately 70% to 90% [7-14]. Thus, for a woman with breast cancer, the probability that her cancer will be detected on mammography is 70-90% and the probability that it will not be detected is 10-30%.

Why is specificity important in mammography?

A test that’s very specific, on the other hand, may have few false positive results, but may miss more cases of the disease. The balance between sensitivity and specificity is important for all screening tests, including mammography.

What are the performance goals for screening mammography as determined by the US Agency for Health Care Policy and Research?

Several reports (3–5) have provided desirable goals for interpretive performance at screening mammography. However, results of published research (6–10) on screening mammography performance indexes vary considerably, from 75% to 95% for sensitivity and from 83% to 98.5% for specificity.

Which lowers the sensitivity of mammography?

Type D (extremely dense): around 10 percent of women undergoing a mammogram will have extremely dense breasts, which lowers the sensitivity of mammography.

What is the sensitivity and specificity of colonoscopy?

Sensitivity of colonoscopy to detect adenomas 6 mm or larger ranged from 75% (95% CI, 63%-84%) to 93% (95% CI, 88%-96%). On the basis of a single stool specimen, the most commonly evaluated families of fecal immunochemical tests (FITs) demonstrated good sensitivity (range, 73%-88%) and specificity (range, 90%-96%).

Why is balancing sensitivity and specificity important for screening tests?

Sensitivity and Specificity Both are needed to fully understand a test’s strengths as well as its shortcomings. Sensitivity measures how often a test correctly generates a positive result for people who have the condition that’s being tested for (also known as the “true positive” rate).

What are current recommendations for mammograms?

Women age 45 to 54 should get mammograms every year. Women 55 and older should switch to mammograms every 2 years, or can continue yearly screening. Screening should continue as long as a woman is in good health and is expected to live 10 more years or longer.

What is ACR type C?

Type C (heterogeneously dense): another 40 percent of women will have this type of mammographic density, which is considered dense and may obscure small masses. Type D (extremely dense): around 10 percent of women undergoing a mammogram will have extremely dense breasts, which lowers the sensitivity of mammography.

Does mammography screening save lives?

At the population level, we can say mammography saves lives by lowering the risk of dying from breast cancer. However, it doesn’t save the life of every woman who gets screened. Not all women get the same benefit from mammography. For example, say a large group of women get regular mammograms.

How accurate are mammograms?

Mammograms aren’t always accurate. The accuracy of the procedure depends in part on the technique used and the experience and skill of the radiologist. Other factors — such as your age and breast density — may result in false-negative or false-positive mammograms. Mammograms in younger women can be difficult to interpret.

Does prevalence affect sensitivity?

So the answer it, yes it could change. There s an unspoken assumption that sensitivity is unchanged by prevalence, but there are lots of counter examples of this. What is probably happening is that sensitivity is not affected directly by prevalence, but rather by differences in the populations.

What is the difference between traditional mammography and 3D mammography?

3D mammography is an FDA-approved advanced technology that takes multiple images, or X-rays, of breast tissue to recreate a 3-dimensional picture of the breast. You may also hear it called breast tomosynthesis. It’s different from traditional mammography In that traditional mammography obtains just a single image.