Starting CPAP therapy is a major step toward better sleep and long-term health. But once you're a few nights into therapy, you might start wondering whether your sleep apnea is actually getting better.
This guide will help you recognize the signs that CPAP therapy is working for you, plus what your AHI score should be after using your CPAP machine. And if you're worried you aren't getting better with treatment, we'll explain what you can do to change that.
How can I tell if CPAP therapy is working?
To know if CPAP therapy is working, check for signs like reduced snoring, fewer awakenings, and improved daytime energy. A low AHI score (under 5) also means your therapy is effective. If you're still tired or snoring, try adjusting your mask fit, pressure settings, or consult your doctor for better results.
Signs CPAP is working to improve your sleep apnea
The main purpose of a CPAP machine is to prevent airway collapse during sleep. Your device does this by delivering a steady stream of air pressure directly into your throat and upper airway.
When therapy is effective, it often leads to noticeable improvements in how you feel.
You feel more rested and alert during the day
Your snoring has improved
You don’t wake up gasping or choking for air
You wake up fewer times during the night
You no longer have morning headaches
You can think more clearly and focus better
Check your AHI score as a sign of CPAP effectiveness
One of the most reliable ways to know if CPAP is working is to track your AHI score, which stands for Apnea-Hypopnea Index.
This number tells you how many breathing disruptions (apneas or hypopneas) you have per hour of sleep. If it’s consistently low, your therapy is likely doing its job.
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You can find your nightly AHI scores on your CPAP machine’s display screen or app, along with your therapy hours and air leaks.
What is a good AHI score on CPAP?
This depends on the type of sleep apnea, but if you have mild to moderate sleep apnea, most doctors want your AHI score to fall below 5. If you have very severe sleep apnea, your doctor may aim for 10 AHI.
| 0-4 AHI | Great | Below threshold for sleep apnea |
| 5-7 AHI | Good | Should improve with small tweaks |
| 8-15 AHI | Needs improvement | May need changes to treatment plan |
| 15+ AHI | Poor | CPAP not effective enough at current pressure |
