A review of the medical literature found that pit bulls and pit bull cross-breeds were involved in 42–45% of dog attacks.[31] Fatalities were most often reported when children were attacked, with 70% of victims being under the age of 10.[31]
Several studies determined that pit bull owners, and owners of other "vicious" or "high risk" breeds (most commonly identified as Akita, Chow Chow, Doberman Pinscher, Rottweiler, and Wolf-mix), are more likely to have criminal convictions and are more likely to display antisocial behaviors. A 2006 study compared owners of "high risk" dogs to owners of "low risk" dogs. "High risk" dogs included “vicious” dogs by breed (e.g., pit bulls) or “vicious” actions (e.g., any dog that had bitten, attacked, or killed a person or other animal). The study determined that "high risk" dog owners had nearly 10 times as many criminal convictions then did "low risk" dog owners.[39] A 2009 study[40] and a followup 2012 study generally supported these findings.[41]
PS: I never really know what else to call pit bull it's not really a "group" and the definition is rather vague, but repeating pit bull all the time is rather repetitive. Any suggestions?
I call all of the pit bull breeds pit bulls (or pits or pibbles) despite the definition being vague. It'd be a bit awkward to walk around in public and say, "check out that Staffordshire bull terrier." I just think lumping all the breeds into one group when citing bite statistics is misleading.
You're really not entitled to your own facts, and this fact is false. All the data everywhere shows that pit bulls are always at the top of the "most likely to be involved in biting incidents" charts. Ontario, for example, has reduced dog bite incidents by about 25% by banning pit bulls from being kept as pets.
I just read through a couple reports, they include wonderful stories like the pit bull who knocked over an old lady and broke her hip as an attack.
Edit: To make an anecdotal, worthless point...I live in a really poor area of Portland. I walk through the neighborhood and on just about every block there is one house with a locked up pit bull behind a 4 foot chain link fence. These dogs are aggressive, abused and very well represent a danger to people.
This doesn't take into account any qualitative analysis either. For example, how many people buy a retriever or lab and train (aka, abuse) it to be aggressive towards everyone (i.e., a guard dog)?
Also, while voluntary, the American Temperament Test Society tests dogs in a number of scenarios for the overall temperament. Pit bull breeds do very well in these tests and have some of the highest sample sizes.
For example, page 1 (http://atts.org/breed-statistics/statistics-page1/#totals) lists the American Pit bull terrier and American Staffordshire terrier as ranking very highly and having 800+ subjects.