Approximately three-fourths of service members still reported insomnia as a problem after PTSD treatment, reports Military Times.

The researchers took an even deeper look into the results and found additional important information. For those service members who no longer met criteria for PTSD after successful treatment, more than half continued to report insomnia, and 13 percent continued to report problems with nightmares. Again, this is from those troops who made such significant improvement that they no longer had enough symptoms to retain the PTSD diagnosis.