As a back pain sufferer I'm extremely disappointed to read this article and study. It seems to me it's the old "which came first, the chicken or the egg?" scenario. Do the researches consider that their results may, in fact, be backwards? That back pain causes emotional stress and one to cope inefficiently as opposed to the other way around? Everything cited in their examples could easily be the other way around.
It goes without saying, really, that stress increases pain as stress increases muscle tension, but even during the best of times and most stress free I have been 'layed up' with incredible pain.
It is difficult enough in some cases to find the cause of back pain, for me it took almost 4 years but there is indeed a cause. If all my doctors had read this article I fear they never would have continued trying to find the problem - it would have been chalked up to "all in my head."
It's always a worrisome thing when medical experts relegate to the mind things that don't readily show a visible cause.