This correlation seems to have nothing to do with blast exposure as the title suggests From the article

The rates for these combat occupations are roughly twice those of service members who work in noncombat jobs like data processing or food service.

The article even mentions there isn’t any implied causation between blasts and non-blast exposed combat troops either in the data presented (except maybe a 4% difference in suicide rate between artillery crews and combat troops with less exposure). The data they are presenting* shows the largest drop in rate is between combat and non combat troops How can the author have this information and come away with this conclusion?