Table 3.

Gastric antral CSA, gastric volume, and Perlas grade assessed by gastric ultrasound

	C group (n = 45)	P1 group (n = 42)	P2 group (n = 42)	p
CSA, RLDP (cm2)	5.81 ± 0.57	6.04 ± 0.66	6.16 ± 0.57a	0.024
GV (mL)	49.15 ± 15.14	52.40 ± 17.26	57.51 ± 16.43	0.059
GV/W (mL/kg)	0.74 ± 0.29	0.78 ± 0.26	0.88 ± 0.26	0.057
Perlas 0/1	44 (97.8)/1 (2.2)	36 (85.7)/6 (14.3)	24 (57.1)/18 (42.9)ab	< 0.001
GV/W (> 1.5 mL/kg)	1 (2.2)	1 (2.4)	1 (2.4)	0.998

Values are mean ± standard deviation or number (%). p: overall comparison

CSA cross-sectional area, GV gastric volume, GV/W gastric volume/weight, RLDP right lateral decubitus position

^aCompared with the C group, p < 0.05

^bCompared with the P1 group, p < 0.05