How much does culture matter for P.T.S.D.? by David J. Morris

There is quite a bit of compare-and-contrast of British and American P.T.S.D. rates in the piece. Excerpts:

In [Ben Shephard’s] provocative book, “A War of Nerves: Soldiers and Psychiatrists in the Twentieth Century,” he describes a historical cycle that governs the treatment of war stress: “the problem is at first denied, then exaggerated, then understood, and finally, forgotten.”*
One of the largest studies done on combat-related P.T.S.D., published in The Lancet at the height of the Iraq War, reported that around four per cent of British veterans had been diagnosed with the disorder. A meta-analysis of studies on American veterans deployed to Iraq found that the rate of P.T.S.D. diagnosis ranges from 1.4 to thirty-one per cent, although the range is typically between ten to seventeen per cent. In a 2010 study published in The British Journal of Psychiatry, Neil Greenberg, of the Academic Centre for Defence Mental Health, at King’s College London, found an incidence rate of 3.4 per cent.
*Shephard’s is not an original insight, but it is worth restating. One of my favorite anthropologists, W.H.R. Rivers, was publicly discussing what we now know as P.T.S.D. almost a century ago.