Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chernobyl disaster caused cancer cases in Sweden

22.11.2004


Study of development of cancer in seven Swedish counties establishes connection



A statistically determined correlation between radioactive fallout from the Chernobyl accident and an increase in the number of cases of cancer in the exposed areas in Sweden is reported in a study by scientists at Linköping University, Örebro University, and the County Council of Västernorrland County. It is the first study demonstrating such a correlation. It is being published in the scientific journal Journal of Epidemiology and Community Health. A rise in cancer cases related to the Chernobyl accident has previously been established in studies carried out in the former Soviet Union.

After the nuclear power accident at Chernobyl on April 26, 1986, some of the radioactive emissions were carried by the wind to Sweden. Heavy rain caused a relatively large amount, about 5 percent of the Cesium-137 released in the disaster, fell on Sweden, above all along the coastal area of Northern Sweden and northern central Sweden. The fallout in Sweden was unevenly distributed and, compared with the areas close to the nuclear power station at Chenobyl, considerably less. Knowledge of the possible consequences of radioactive fallout on health prompted a number of measures to be taken to reduce these consequences at the time of the Chernobyl accident.


The study now being published aims to help answer the question of whether there is increased cancer morbidity that can be tied to this fallout. The study divides the parishes in the seven northernmost Swedish counties into six classes on the basis of ground coverage of cesium 137. Most of the parishes in the seven counties, 333 out of 450, were impacted by the fallout. One class comprising 117 parishes received no fallout, and the individuals in these parishes were used as a control group. Those people aged 0-60 who were resident in the counties in question and who had the same address on December 31, 1985 and December 31, 1987, were monitored for development of cancer. At the outset of the study 1,143,182 individuals were included, and 22,409 cases of cancer were registered during the years 1988 through 1996.

There is a statistically established correlation between the degree of fallout and an observed rise in the number of cancer cases. The increase involves all types of cancer in the aggregate. On the other hand, no clear effect can be seen for individual forms of cancer, not even for those types that have been regarded as especially susceptible to radiation, such as leukemia or thyroid cancer.

It is remarkable that an increase in cancer morbidity could have occurred after such a relatively short time following the accident, but just such a short time period has been described for groups exposed to radioactive radiation. If the correlation found here is not a product of chance, or other unknown disturbances than those corrected for in the analysis, then one possible explanation is that the radiation hastened the growth of already established tumors in their early stages, rather than that new tumors occurred.

Anika Agebjörn | EurekAlert!
Further information:
http://www.vr.se

More articles from Health and Medicine:

nachricht Researchers release the brakes on the immune system
18.10.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Terahertz spectroscopy goes nano

20.10.2017 | Information Technology

Strange but true: Turning a material upside down can sometimes make it softer

20.10.2017 | Materials Sciences

NRL clarifies valley polarization for electronic and optoelectronic technologies

20.10.2017 | Interdisciplinary Research

VideoLinks
B2B-VideoLinks
More VideoLinks >>>