Researchers from Oxford University and The Karolinska Institute in Stockholm examined the Swedish medical records, dating back 41 years, of TBI survivors, and compared them to those of unaffected siblings to assess genetics and upbringing. Individuals were matched by sex and age.

The research found that one in every 100 TBI survivors died before the age of 56; the figure increased significantly if the survivor had a history of psychiatric disorder or substance misuse.

TBI survivors were also found to be twice as likely to commit suicide before the age of 56 in comparison to their unaffected siblings

Peter Mulhern, a senior serious injury solicitor at Thompsons Solicitors, said: “The results highlight the need to refocus treatment for TBI patients.

“Emphasis must be placed on monitoring and supporting mental health conditions whether they are pre-existing or have developed following a brain injury. In order to tackle this problem both TBI patients and their families must be aware of the mental health related dangers that trauma can cause.

“In light of this research it seems astonishing that current guidelines do not recommend that TBI patients are assessed for mental health or suicide risks.

“At Thompsons we understand the long term effects a brain injury can have on an individual’s wellbeing and we work closely with client support coordinators and dedicated case managers to ensure our clients get the long term care they require.

“This study highlights that to actually facilitate rehabilitation, it is imperative that doctors, support workers and families are made aware of all the risks posed.”