What a bogus study.
500 people is such and arbitrary number. It's not an accurate account of the true population.
Hell, at my school, I know of people who play game and I know people who don't and they range from male to female to skinny as hell, (me), to pudgy, (but he plays tennis...), to the jocks on the first floor of the dorm, and EVERYWHERE inbetween.
And besides, I could have told you with just mere conjecture the same thing this study did. But its not fact. Its only an increased chance. Depends on how heavy a gamer you are.
Are you playing everyday? How long every day? What types? Are you getting trapped by story or are you just in a continual loop, playing because you are frustrated or for online multiplayer superiority complex?
Where's Jack Thompson behind this? I know he must be... When will he raise his ignoramous head again?