Health Conditions That Increase Stroke Risk Rise Across All Ages, Races

Roughly 80 percent of all first strokes arise from risks that people can influence with behavioral changes, doctors say — risks like high blood pressure, smoking and drug abuse.

Smoking, drug abuse and diabetes are all modifiable risk factors for stroke. Yet a large study of patients hospitalized for stroke suggests the number of people with these risk factors is rising.

(Image credit: Brenda Muller/Gallo Images/Getty Images)