The shelf for this, in the order it is most useful: Still Tired on CPAP With Good Numbers? Reasons and Next Steps — the same question with the sourced version of the answer. CPAP Leak Rate: What's Acceptable and How to Fix High Leaks — the number to read next to the event count, and why. Why Does My AHI Change Night to Night? Normal Variation Explained — why the figure moves when nothing has changed. Nothing on SomniTalk is medical advice. Talk to your own clinician before changing therapy.