Gene polymorphisms associated with sudden decreases in heart rate during extensive peritoneal lavage with distilled water after gastrectomy

Table 1 Baseline and clinical parameters of patients with ≥ 30% vs < 30% heart rate variability, n (%)

Variable	HRV ≥ 30%	HRV < 30%	χ2	P value
Sex			1.828	0.18
Female	9 (16.36)	46 (83.64)
Male	13 (9.49)	124 (90.51)
Age (yr)			0.098	0.75
< 60	5 (14.29)	30 (85.71)
≥ 60	17 (10.83)	140 (89.17)
Smoking status			0.592	0.44
No	20 (12.58)	139 (87.42)
Yes	2 (6.06)	31 (93.94)
Hypertension			0.213	0.64
No	13 (10.66)	109 (89.34)
Yes	9 (12.86)	61 (87.14)
Diabetes			0.299	0.58
No	19 (10.80)	157 (89.20)
Yes	3 (18.75)	13 (81.25)
Blood type			0.964	0.81
A	9 (12.33)	64 (87.67)
AB	1 (5.00)	19 (95.00)
B	5 (11.36)	39 (88.64)
O	7 (12.73)	49 (87.27)
Thyroid function			0.005	0.95
Normal	20 (11.70)	151 (88.30)
Abnormal	2 (9.52)	19 (90.48)

All P values are more than 0.05. HRV: Heart rate variability.