Prospective, randomized comparison of two supplemental oxygen methods during gastroscopy with propofol mono-sedation in obese patients

Table 1 Baseline characteristics of patients, procedure time and total propofol dosages

Characteristic	WNJT group, n = 49	Nasal cannula group, n = 52	P value
Age (yr)	37.89 ± 13.7	37.5 ± 12.5	0.892
Height (m)	1.7 ± 0.1	1.7 ± 0.1	0.293
Weight (kg)	100.7 ± 17.0	96.4 ± 18.2	0.217
Sex (M/F)	19/30	16/36	0.398
Body mass index (kg/m2)	35.6 ± 4.8	34.7 ± 4.1	0.316
Baseline SpO2 (%)	97.1 ± 1.5	97.1 ± 1.6	0.982
ASA physical status grade (I/II)	22/27	23/29	0.946
Procedure times (min)	4.6 ± 0.9	4.8 ± 0.4	0.065
Total propofol dosages (mg)	229.4 ± 41.7	210.2 ± 45.4	0.030

Data are presented as the mean ± SD or number of patients. ASA: American Society of Anesthesiologists; SpO₂: Pulse oxygen saturation; WNJT: Wei nasal jet tube.