What does "events per hour" mean?

MyAir score

"Events per hour" means the number of breathing events -- called apneas and hypopneas -- you experience each hour.

When you have an apnea, air stops flowing to your lungs for 10 seconds or longer -- that is, you actually stop breathing.

A hypopnea is a partial blockage of the airway that lasts for 10 seconds or longer.

Your CPAP machine notes the number of breathing events you have in each hour. This number can help measure how well your treatment is working.