By Jorge Calvillo (staff@latinospost.com) | First Posted: May 14, 2014 09:47 PM EDT

For many years there has been speculation on the possible risks of getting cancer due to the use of cellphones and mobile devices; however, no research had provided conclusive data on the matter, until now.

A new study carried out by the University of Bordeaux and published on the specialized magazine "Occupational & Environmental Medicine" seems to have found proof that intensive use of cellphones can, in fact, favor the appearance of brain tumors in users.

According to The Guardian, the French investigators concluded that people who use cellphones for over 15 hours every month have between two and three times more risk of developing glioma and meningioma tumors, in comparison to the people who rarely use their phones.

This is the first time in recent years that a scientific study concludes that there is actually a relation between the use of cellphones and the development of certain types of cancer.

In 2011, a study carried out by the Cancer Research Institute did not find "convincing evidence" of the link between cellphone use and brain tumors, but highlighted that the long term damages on people's health are a possibility, quoted The Wire.

The same source highlights another study made by the International Research Agency of the World Health Organization, which revealed that electromagnetic fields generated by cellphones which emmit radiofrequencies are "possible cancerous for humans", however, in this case there was no conclusive proof.

The new study observed 253 cases of glioma and 194 of meningioma reported in four French departments between 2004 and 2006; these patients, cellphone users, were compared to another 892 healthy patients who also used cellphones.

The analysis concluded that there is a greater risk of contracting brain tumors among users who use their cellphones intensively, especially among those who use it as a part of their job, than in those patients with less cellphone activity.

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