Eh, I was surprised that the article didn't make any mention of this (any effort countering what seemed to me to be an obvious explanation), so I made a brief c

Eh, I was surprised that the article didn't make any mention of this (any effort countering what seemed to me to be an obvious explanation), so I made a brief comment about it. I don't care enough to track down and comb through the study. From experience, I tend to suspect the article is at fault, not the study, though the error of "spinning a study to make it appear to prove something it didn't" is unfortunately rather more common than something like "didn't mention anything about how the study showed causation".