A study has suggested that there is no link between mobile phone usage and brain cancer.

The largest ever study on this subject has found that cancer rates in the central nervous system did not differ significantly between people who do not use mobile phones and long-term users.

The study, carried out by the Institute of Cancer Epidemiology in Copenhagen, analysed data from the whole Danish population aged over 30 and born in Denmark after 1925.

Information was gathered from the Danish Cancer Register and the Danish phone network and researchers analysed figures from nearly 11,000 central nervous system tumours between 1990 and 2007.

The results showed similar cancer rates for people who had used a mobile phone for 13 years or more and non-users, suggesting there is no increased risk of cancer arising from mobile phone usage.

However, the authors of the study were quick to point out the limitations of the study.

They said: “As a small to moderate increase in risks for subgroups of heavy users or after even longer incubation periods than 10-15 years cannot be ruled out, further studies with large study populations… are warranted.”

It is estimated that there are more than five billion mobile phone users worldwide.