High-flow oxygen via oxygenating mouthguard in short upper gastrointestinal endoscopy: A randomised controlled trial

Table 5 Patient-reported outcomes for the intention-to-treat analysis (n, %)

Patient-reported outcomes – Likert scale	SNC (n = 154)	HFMG (n = 138)	P value
(1 = Very uncomfortable or unbearable, 5 = Very comfortable or not at all)
Response rate	115, 74.7%	102, 73.9%	0.882
Comfort level ≤ 2	4, 3.5%	5, 4.9%	0.6
Abdominal pain ≤ 2	3, 2.6%	0, 0.0%	0.1
Bloating ≤ 2	1, 0.9%	1, 1.0%	0.932
Mouth dryness ≤ 2	2, 1.7%	1, 1.0%	0.633
Mouth pain ≤ 2	2, 1.7%	1, 1.0%	0.633
Headache ≤ 2	1, 0.9%	1, 1.0%	0.932

HFMG: High flow via oxygenating mouthguard; SNC: Standard nasal cannula.