HAHAHAHA This figure - "15 times more likely" - is based on an analysis of just 39 people with diabetes and had a confidence interval ranging from 3.16 to INFINITYpic.twitter.com/KSw3jQxpDM
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I'm not going to say this is an inadequate sample to run this sort of model on, but I suspect @ADAlthousePhD and others might have something to say!
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.