Table 3.

Statements and results from the Delphi process for items reaching consensus or strong consensus: predictive factors of surgical failure: diagnostic workout

Item No	Final Statement Version	Mean	Outlier	Delphi Round
24	The Home Sleep Apnea Test (HSAT) study is an adequate test for the post-surgical evaluation of OSA	7,6	1	II
25	In case of persistence of symptoms post-surgery other reasons for excessive daytime sleepiness apart from sleep related disorders should be investigated	8,50	0	II
26	The first PSG study should be scheduled minimum 3-months after soft tissue surgery and 12-months after skeletal surgery	7,58	0	I
27	The postoperative PSG study should be performed with the same device used for the preoperative evaluation and in the same environmental situations	7,50	0	I
29	It is essential to investigate the post-operative ESS score in each surgical case	7,14	1	II
30	type I or II sleep study are suggested in case of post-surgery residual snoring and OSAS symptoms (e.g. ESS > 10) but normal AHI < 5 (HSAT)	7,1	1	II
32	DISE should be considered as valid test to identify sites of collapse and obstruction and should be considered in the diagnostic workout of patients with PSG-diagnosed surgical failure	7,50	1	I
33	Postoperative variation in number of apnea compared with the number of hypopneas instead of the comprehensive AHI value should be evaluated in any case of suspected surgical failure	7,23	0	I
34	The PALM evaluation should be considered in patients with surgical failure	7,23	1	I