The effect in non-obese women was smaller than that seen in men (they saw a 22 percent risk reduction), but that may be at least partly attributable to the lower dose.
Interestingly, aspirin can exacerbate symptoms in 4 percent to 11 percent of people who have already been diagnosed with the condition.
"It's not usual for us to encourage people to take aspirin, because you don't know who does or does not have [this sensitivity] until you have a problem," Horovitz said.
At this point, it's not clear exactly why aspirin has this effect.
More information
Visit the U.S. Centers for Disease Control and Prevention for more on asthma in women.
