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Table 1 Baseline data before and after propensity score matching

From: Isoperistaltic versus antiperistaltic uncut Roux-en-Y anastomosis after distal gastrectomy for gastric cancer: a propensity score matched analysis

Characteristics

Before matching

After matching

ANTI (n = 220)

ISO (n = 392)

P

ANTI (n = 183)

ISO (n = 183)

P

n

%

n

%

n

%

n

%

Sex

 Male

139

63.2

243

62.0

0.77

116

63.4

114

62.3

0.829

 Female

81

36.8

149

38.0

 

67

36.6

69

37.7

 

Age (mean ± SD, year)

63.3

± 8.6

65.6

± 8.4

 

64.3

± 8.7

64.9

± 8.5

0.563

BMI (mean ± SD, kg/m2)

24.9

± 4.4

25.2

± 4.3

 

24.5

± 4.3

24.8

± 4.5

0.623

Year of surgery

 2016

43

19.6

118

30.1

0.011

28

15.3

34

18.6

0.326

 2017

92

41.8

155

39.5

 

67

36.6

75

41.0

 

 2018

85

38.6

119

30.4

 

88

48.1

74

40.4

 

ASA score

 I

70

31.8

90

23.0

0.045

49

26.8

50

27.3

0.992

 II

109

49.5

210

53.6

 

98

53.6

97

53.0

 

 III

41

18.6

92

23.5

 

36

19.7

36

19.7

 

Area

 Urban

95

43.2

206

52.6

0.026

86

47.0

85

46.4

0.917

 Rural

125

56.8

186

47.4

 

97

53.0

98

53.6

 

Education (years)

 < 12

41

18.6

99

25.3

0.061

39

21.3

37

20.2

0.797

 ≥ 12

179

81.4

293

74.7

 

144

78.7

146

79.8

 

History of abdominal surgery

 Yes

120

54.5

198

50.5

0.338

107

58.5

105

57.4

0.832

 No

100

45.5

194

49.5

 

76

41.5

78

42.6

 

History of diabetes

 Yes

83

37.7

132

33.7

0.313

75

41.0

70

38.9

0.686

 No

137

62.3

260

66.3

 

108

59.0

113

61.1

 

History of smoking

 Yes

83

37.7

168

42.9

0.216

53

29.0

59

32.2

0.496

 No

137

62.3

224

57.1

 

130

71.0

124

67.8

 

Tumor location

 Gastric body

79

35.9

99

25.3

0.020

56

26.8

44

24.0

0.331

 Between

96

43.6

197

50.3

 

92

53.6

97

53.0

 

 Pyloric canal

45

20.5

96

24.5

 

35

19.7

42

23.0

 

Tumor size (cm)

 < 4

123

57.7

259

66.1

0.040

108

59.0

98

53.6

0.292

 ≥ 4

97

42.3

133

33.9

 

75

41.0

85

46.4

 

Preoperative chemotherapy

 Yes

21

9.5

22

5.6

0.068

14

92.3

15

92.4

0.847

 No

199

90.5

370

94.4

 

169

7.7

168

7.6

 

Clinical T factor

 T1

58

26.4

73

18.6

0.009

41

22.4

42

23.0

0.342

 T2

46

20.9

99

25.3

 

44

24.0

31

16.9

 

 T3

52

23.6

130

33.2

 

43

23.5

53

29.0

 

 T4

64

29.1

90

23.0

 

55

30.1

57

31.1

 

Clinical N factor

 N0

101

45.9

219

55.9

0.018

80

43.7

92

50.3

0.209

 N1–3

119

54.1

173

44.1

 

103

56.3

91

49.7

 
  1. ANTI antiperistaltic uncut Roux-en-Y anastomosis, ISO Isoperistaltic uncut Roux-en-Y anastomosis