How common is reactive arthritis?
Reactive arthritis is not common. There are an estimated 30 to 40 new cases a year in England for every 100,000 people. Reactive arthritis associated with an STI is much more common in men than in women. Men account for 90% of all cases. Reactive arthritis associated with a stomach infection occurs equally among men and women. Most cases of reactive arthritis develop in people who are 20 to 40 years old.
