Predictor of respiratory disturbances during gastric endoscopic submucosal dissection under deep sedation

Table 2 Relationship between preoperative apnea-hypopnea index and intraoperative apnea-hypopnea index

	n (%)	Preoperative AHI	Intraoperative AHI	P value
All patients	35	9.25 ± 11.03	12.76 ± 7.59	0.049
SAS
Negative	18 (51.4)	2.55 ± 1.40	9.29 ± 5.37b	< 0.001
Positive	17 (48.6)	16.34 ± 12.35	16.44 ± 7.99	NS
Mild	9 (52.9)	8.41 ± 2.37	15.21 ± 8.08	0.042
Moderate	6 (35.3)	18.55 ± 3.35	15.58 ± 7.60	NS
Severe	2 (11.8)	45.40 ± 7.35	24.57 ± 7.67	NS

Data are presented as mean ± standard deviation unless otherwise indicated.

^bP = 0.017, SAS negative vs positive. AHI: Apnea-hypopnea index; SAS: Sleep apnea syndrome; NS: Not significant.