User:Kittyvontokyo/sandbox

Epidemiology
Patellar dislocation is a common injury that is found amongst many active and young adults who are under the age of 20 according to Chun-Hao Tsai, author of a journal from orthopaedic surgery and research. The manual of Structural Kinesiology by B.T Floyd states that people who have larger Q-angles tend to be more prone to having knee injuries such as dislocations, due to the central line of pull found in the quadriceps muscles that run from the anterior superior iliac spine to the center of the patella. The range of a normal Q angle for men ranges from <15 degrees and for females <20 degrees, putting females at a higher risk for this injury.

Data
In a journal by the Department of Orthopaedic Surgery, Brian Waterman collected incidence rate data in respect to sex, age and race in the U.S. Patellar dislocations have been estimated to occur among an at risk –population of 1,774,210,081 people per year. The breakdown of the incidence rates found in AM J sports medicine journal, among the ages of 10-17 years old were found to be about 29 per 100,000 persons per year, while the adult population average for this type of injury ranged between 5.8 and 7.0 per 100,000 persons per year. The highest rates for this type of injury were found in the youngest age groups, while the rates declined with increasing ages.Race is a significant factor for this injury, where Hispanics, African-Americans and Caucasians had slightly higher rates of patellar dislocation due to the types of athletic activity involved in basketball 18.2%, soccer 6.9% and football 6.9%, according to Brian Waterman.