A new study looked at risk factors for suicide among military personnel across all branches of service. There's some thought that deployments to Iraq and Afghanistan have been increasing the risk of suicide.
Researchers at the the Naval Health Research Center looked at National Death Registeries and a study, of long-term health effects of deployment.
They examined 22 risk factors including, number and length of deployments, combat experience, rank, and mental health disorders, like bipolar disorder, depression and alcohol misuse.
They found no link between deployments and the risk of suicide. Instead, the majority of suicides happened among people who never deployed in support of the current operations
Researchers say mental health factors, such as depression, bipolar disorder, and alcohol related problems were associated with suicide
Male service members had a two times higher risk of suicide than female service members but this same trend also exists in the general population.
The study's in the current issue of the Journal of the American Medical Association.