[Retracted] A Study on Risk Factors Associated with Reflux Esophagitis in Patients Undergoing Esophageal Cancer Surgery

Table 1

Analysis of the patients’ personal factors.

Group	Occurrence group (n = 45)	Nonoccurrence group (n = 255)	X^2/t
Sex			0.040	0.842
Male	32	185
Female	13	70
Age (years old)	59.36 ± 5.27	59.31 ± 5.19	0.059	0.953
Bodyweight	60.11 ± 2.65	62.98 ± 2.47	7.107	<0.001
BMI (kg/m^2)	21.66 ± 1.28	22.10 ± 1.32	2.071	0.039
Tumor stage
T1N0M0	2	30	2.151	0.142
T2N0M0	4	32	0.485	0.486
T3N0M0	11	62	0.004	0.985
T2N1M0	10	50	0.163	0.686
T3N1M0	10	52	0.078	0.780
T4N2M0	6	20	1.457	0.227
T2N2M1	2	9	0.091	0.763
Histological type
Squamous cell carcinoma	30	162	0.163	0.686
Adenocarcinoma	12	73	0.072	0.788
Undifferentiated carcinoma	3	20	0.075	0.784
Tumor location
Upper esophagus	12	70	0.012	0.913
Median esophagus	30	165	0.065	0.799
Lower esophagus	3	20	0.075	0.784