Previous studies have suggested a link between HRT use and breast cancer. Ahmedin Jemal and colleagues at the American Cancer Society conducted statistical analysis to examine patterns in invasive and in situ breast cancer incidence in relation to age, tumour size at diagnosis and disease stage. Regular mammography screening starts at 40 and HRT is most common in women aged 50 or older, so the study focussed on women age 40 and above.
The research team examined trends in breast cancer incidence in the National Cancer Institute’s Surveillance Epidemiology and End Results database from 1975 to 2003. The database includes women from 5 US States (Connecticut, Hawaii, Iowa, New Mexico, and Utah) and 5 metropolitan cities (Atlanta, Detroit, San-Francisco, and Seattle). Almost 400,000 invasive and 60,000 in situ cases of breast cancer were diagnosed in that time. Breast cancer incidence rates increased by almost 40% between 1980 and 1998, and then showed a downward trend with a dramatic decrease from 2002 to 2003. The greatest decline was in women who had small tumours, early stage disease, estrogen/progestin positive tumours, and who were aged 55 or older.
Jemal et al concluded that the speed of decrease in breast cancer incidence, following the dramatic reduction in HRT use after the Women’s Health initiative publication in 2002, likely reflects the early consequences of reductions in HRT use, while the downturn in incidence rates across multiple age groups beginning 1998/1999 reflects the saturation of mammography.
New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
Reusable carbon nanotubes could be the water filter of the future, says RIT study
30.03.2017 | Rochester Institute of Technology
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
24.04.2017 | Physics and Astronomy
24.04.2017 | Materials Sciences
24.04.2017 | Life Sciences