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					Originally Posted by icehog3  In simple terms, I believe it means that your normal sleep pattern is disturbed 65 times an hour, or more than once every minute. This is right about were mine was when I had my sleep studies, and it is fairly severe sleep apnea. 
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 I believe the 65 is actually the total number of disturbances for the night, with an average of 10.7 an hour, which is not severe.  If I remember correctly, and it has been a few years now since my test, they do not even treat you if it is 5 or less.  So I think you're better off than most.  Given that number, I'm really surprised you're set at 20.  It's possible I'm reading it wrong, but just so you know how I got there:
365.5 minutes of sleep time divided by 60 min/hr = 6.09
65 arousals/awakenings divided by 6.09 = 10.7