Hello, I am day 2ish with my CPAP machine. My husband noticed that I am less confused. lol. He is very supportive. My question is" what does AHI mean? I still feel headachy. I am only getting used to my mask etc. So far, I enjoy the fresh air and humidification from the machine. Waking up without dry lips and mouth. I am keeping a diary to help me focus on sleep goals ;as I have horrible sleep routines. Husband retired a yr ago. 
. Thank you.
AHI is your apnea/hypopnea index. It’s the count of how many respiratory events you are having per hour,
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