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**Using Twitter To Track Down Heart Disease** (The Huffington Post)
Why does one community have higher levels of heart disease than another?
Measuring such things is tough, but newly published research reports telling
indicators can be found in bursts of 140 characters or less. **ars technica**
A study was released by researchers at the University of Pennsylvania that
found a surprising correlation when studying two kinds of maps: those that
mapped the county-level frequency of cardiac disease, and those that mapped
the emotional state of an area's Twitter posts. In all, researchers sifted
through over 826 million tweets, made available by Twitter's research-friendly
"garden hose" server access, then narrowed those down to roughly 146 million
tweets that had been posted with geolocation data from over 1,300 counties
(each county needed to have at least 50,000 tweets to sift through to qualify.
**Digital Trends** Locations where tweets expressing anger, stress and fatigue
were more common also had higher numbers of deaths from heart problems.
\"Psychological states have long been thought to have an effect on coronary
heart disease,\" said Margaret Kern of the University of ...