Fig. 3
From: Hypopnea definitions, determinants and dilemmas: a focused review
This figure shows a hypopnea scored using the alternative criteria IVB, i.e., ≥50% decrement in flow associated with a ≥ 3% decrease in oxygen saturation or an arousal. This event would have been missed if using the recommended criteria IVA of the 2012 AASM Scoring guidelines