CA events are about all I have...in moderation. Any 10-second cessation of breathing can be scored, so while some may indeed be central apnea, they can also be just changing position in bed, swallowing and other junk that is meaningless. For most of us being treated for obstructive sleep apnea they are benign and may not even be disruptive to sleep. Many times CA is scored at the beginning and end of the sleep session when we're not really sleeping, and we will often refer to this as "sleep-wake-junk" (SWJ).
To know the difference between benign incidental CA and the type that is disruptive, you need to look at duration, and zoom in on the respiratory flow chart. If you see a flat line of breathing followed by a good spike of recovery breathing, then it's more likely that was a real central that you needed to arouse from sleep to resolve. CA in low numbers is really not a problem, but when it becomes clustered in the middle of the night it might be complex apnea that is the real deal.
We see a lot more CA in new users, people adapting to higher pressure, and the use of EPR or pressure support that can wash-out CO2 and cause centrals. There is a lot to learn to try to decide if it's something to actually try to minimize, or ignore. For the most part CA under 3.0 per hour is probably fine. Over that, it might be worth looking into why it is happening and try to minimize it. For new users, it's important to realize, it often goes away in a few weeks without intervention.
My sleep test had very few Centrals and since starting CPAP I have noticed getting these CA events. Excluding the SWJ, I still sometimes get a cluster of them in the middle of the night. So I suspect it is this washout effect. Would decreasing EPR to 1 be enough to show an improvement if that is it? EPR is currently 3 but as my CPAP is fixed at 6 and the machine will not go below 4, the EPR is effectively 2.