Interestingly, scrolling down to "discussion", 123 patients were morbidly obese. That could affect our comments about walking distances (although, of course, not the lack of difference between the groups).
In table B at the bottom, it would be interesting to know which was centre F, the one with so many more NSAEs.
I'm too muddle-headed at the moment to work out the relevance, but I notice that, overall, the results in table 4 for those meeting ME criteria, or the "all psychiatric" have roughly equal percentages in the ≤4 and the >4 columns for those who met the criteria as for those who did not. But when you get down to specific psychological criteria, such as minor depressive, the difference is much greater between those who have it and those who do not (9/91 and 12/88).