Mammogram warns against cancer

Mammogram warns against cancer.


Often-conflicting results from studies on the value of unchanging mammography have only fueled the meditate about how often women should get a mammogram and at what age they should start. In a new enquiry of previous research, experts have applied the same statistical yardstick to four large studies and re-examined the results. They found that the benefits are more compatible across the large studies than previously thought medicine. All the studies showed a telling reduction in breast cancer deaths with mammography screening.



So "Women should be reassured that mammography is actually effective," said study researcher Robert Smith, senior big cheese of cancer screening for the American Cancer Society. Smith is scheduled to present the findings this week at the 2013 San Antonio Breast Cancer Symposium supplements. The findings also were published in the November issuance of the review Breast Cancer Management.



In 2009, the US Preventive Services Task Force (USPSTF), an sovereign group of national experts, updated its recommendation on mammography, advising women ancient 50 to 74 to get mammograms every two years, not annually.The group also advised women venerable 40 to 49 to talk to their doctors about benefits and harms, and decide on an one basis whether to start screening. Other organizations, including the American Cancer Society, with to recommend annual screening mammograms beginning at age 40.



In assessing mammography's benefits and harms, researchers often bearing at the number of women who must be screened to prevent one death from breast cancer - a covey that has ranged widely among studies. In assessing harms, experts hook into account the possibility of false positives. Other possible harms include finding a cancer that would not otherwise have been found on screening (and not been unsettled in a woman's lifetime) and anxiety associated with additional testing.



Smith's body looked at four large, well-known reviews of the benefit of mammography. These included the Nordic Cochrane review, the UK Independent Breast Screening Review, the USPSTF inspect and the European Screening Network review. To regiment the estimates of how many women need to be screened to delay one breast cancer death, the researchers applied the data from each of the four reviews to the scenario employed in the UK study.



Before this standardized review, the number of women who must be screened to prevent one death ranged from 111 to 2000 to each the studies. Smith's team found that estimates of the benefits and harms were all based on singular situations. Different age groups were being screened, for instance, and different follow-up periods were used. Some studies looked at the copy of women for whom screening is offered and others looked at the multitude who actually got mammograms. There often is a huge difference between those two groups.



So "Thirty to 40 percent don't show up, and they are counted as having a mammogram although they did not when they be no more of breast cancer. This hugely depresses the benefits. If you don't have a hanker follow-up, you are not able to accurately measure the benefit. Some women end 20 or more years after the diagnosis". After the researchers used a single, run-of-the-mill scenario, the gap in benefit estimates among studies dropped substantially - ranging from 64 to 257 women who must be screened to taboo a single death from breast cancer.



Dr Michael LeFevre, co-vice chairman of the USPSTF, reviewed the imaginative findings but was not involved in the study. "For women superannuated 50 to 69, it confirms that mammography can reduce deaths from soul cancer. The new analysis doesn't include women in their 40s, which is one of the central parts of the continuous debate about the use of screening mammography. The task force is in the process of updating the 2009 backing who is also a professor of family and community medicine at the University of Missouri. "The update is not in comeback to the re-analysis malayalam. It's standard timing for an update".

tag : cancer women screening breast mammography studies review harms benefits

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