Effects of remifentanil combined with propofol on hemodynamics and oxidative stress in patients undergoing resection of rectal carcinoma

Table 1 Baseline data

Factors	Remifentanil group (n = 45)	Sufentanil group (n = 59)	χ2 value	P value
Sex			0.035	0.850
Male	26	33
Female	19	26
Age			0.373	0.541
< 60 yr old	24	35
≥ 60 yr old	21	24
BMI			0.148	0.700
≥ 25 kg/m2	20	24
< 25 kg/m2	25	35
ASA classification			3.141	0.208
I	21	18
II	22	39
III	2	2
History of diabetes mellitus			3.083	0.079
Yes	17	13
No	28	46
History of hypertension			1.590	0.207
Yes	40	47
No	5	12
History of smoking			0.035	0.850
Yes	26	33
No	19	26

ASA: American society of anesthesiologists; BMI: Body mass index.