Table 3.

Characteristics of patients who experienced vomiting during the operation.

		Vomiting (−) N = 190	Vomiting (+) N = 19	p
Age, median (25th–75th percentile)		30.00 (26.00–34.00)	29.00 (24.00–31.00)	0.144
BMI, median (25th–75th percentile)		28.20 (25.70–30.00)	28.40 (27.30–30.40)	0.464
1st TM nausea/vomiting, n (%)		45 (23.7)	14 (73.7)	<0.001
Smoking, n (%)		19 (10.0)	1 (5.3)	1.000
Motion sickness, n (%)		38 (20.0)	9 (47.4)	0.017
PMS, n (%)		15 (7.9)	5 (26.3)	0.023
Newborn sex, n (%)	Male	95 (50.0)	3 (15.8)	0.004
	Female	95 (50.0)	16 (84.2)

BMI: body mass index; 1st TM nausea/vomiting: severe nausea and vomiting in the first trimester; PMS: premenstrual syndrome.