Table 3.

Pre- and post-treatment PSG oAHI in the SGP and NST groups by individual categories of OSA

Average PSG parameter	SGP group pre-treatment	SGP group post-treatment	SGP group p-value	NST group pre-treatment	NST group post-treatment	NST group p-value	Between groups p-value
oAHI (events/hour) mild OSA	3.98	2.4	0.026*	3.45	5.25	0.5	0.3
oAHI (events/hour) moderate OSA	6.8	2.2	<0.001*	6.6	3.9	0.1	0.2
oAHI (events/hour) severe OSA	29.6	5.4	<0.01*	39.1	2	—	—

PSG = polysomnography; SGP = supraglottoplasty; NST = non-surgical treatment; oAHI = obstructive apnoea-hypopnoea index; OSA = obstructive sleep apnoea