Effect of low-concentration carbohydrate on patient-centered quality of recovery in patients undergoing thyroidectomy: a prospective randomized trial

Table 5 Comparison of preoperative gastric volume among groups

		F Group	PW Group	CH Group	P value
CSA (cm²)	Supine position	4.01 (0.90)	3.92 (0.77)	3.82 (0.84)	0.903
CSA (cm²)	Right lateral decubitus (RLD)	4.76 (0.56)	4.68 (0.80)	4.42 (0.85)	0.218
GV (ml)		40.00 ± 17.31	37.21 ± 14.94	37.73 ± 16.08	0.734

Data are presented as mean ± SDs, M (IQR). Details of the groups are shown in Table 1
CSA (cm²) = π × AP × CC/4, GV (ml) = 27.0 + 14.6 × right-lat CSA − 1.28 × age
AP The anteroposterior diameter of the gastric antrum, CC The craniocaudal diameter of the gastric antrum

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