The CDC's Morbidity and Mortality Weekly Report (MMWR) has the most interesting statistics. In this issue from about 6 months ago (which I just uncovered in a fit of office cleaning over the weekend) is an analysis of "Nonfatal Fall-Related Injuries Associated with Dogs and Cats -- United States, 2001-2006." Note that these are injuries do to a fall, not due to bite or clawing wounds.
First I knew that such statistics were tracked.
There are many nuggets in here and so the whole report is worth a look. Table 2 has the bottom line for estimates of rate of injury. Some of the notable findings (notable to me at least) are that people are injured by pet-caused falls at a rate of 26 per 100,000 population. The estimated total of injuries is more than 76,000 annually. Women are more than twice as likely to be injured (or report injuries?) than men. Although the absolute number of injuries is smaller, the highest rate of injury is in people greater than 75 years of age (more than twice the total average rate of injury). The most common injury is a fracture, with an estimated annual total of more than 26,500 pet-induced fractures due to falls (31% of total).
Most of these injuries were dog-induced. As you might guess, most injuries were caused by tripping over the pet, but a significant number reported being pulled or pushed by their pet. Only 20 people are estimated to be injured each year in an attack by a cat, whereas nearly 15 times that number are injured by dog attack. Almost 1,000 people are estimated to be injured while "running from" a dog, but only 43 "running from" a cat.
Finally, a significant number of injuries are estimated in the category of "fell over pet item".
As a cat owner this gives me comfort, but tongue-in-cheekness aside, this is the first published thorough analysis of injuries due to pet-induced falls and is worthy of your attention.