Table 3 Clinicopathological factors depending on the distance of the proximal resection margin (PRM) in the patients who underwent curative distal gastrectomy

Gender

0.936

Male

47

138

189

374

Female

24

49

82

106

Age (years)

0.044

≤60

42

86

119

247

>60

29

101

152

282

T-stage

<0.001

T1

29

97

181

307

T2

23

47

65

135

T3

18

42

24

84

T4

1

1

1

3

N-stage

<0.001

N0

37

106

187

330

N1

14

42

60

116

N2

9

22

18

49

N3

11

17

6

34

Vascular invasion

0.013

Absent

59

158

248

465

Present

12

29

23

64

Lymphatic invasion

0.057

Absent

29

90

144

263

Present

42

97

127

266

Neural invasion

0.062

Absent

39

108

176

323

Present

32

79

95

206

Histology

<0.001

Differentiated

20

67

146

233

Undifferentiated

51

120

125

296

Lauren’s classification

0.199

Intestinal

24

66

127

217

Diffuse

33

81

81

195

Mixed

14

40

63

117

Tumor size (cm)

<0.001

≤3

25

68

151

244

3 - 5

14

46

60

120

≥5

32

73

60

165

Tumor location

<0.001

Lower third

33

87

217

337

Middle third

38

100

54

192