Table 1 Patient characteristics and operative outcomes before and after propensity score matching with multiple imputation and complete cases.

From: Long-term outcomes of omentum-preserving versus resecting gastrectomy for locally advanced gastric cancer with propensity score analysis

 

Before PSM

PSM with MI

PSM with CC

OPG

ORG

P value

OPG

ORG

P value

OPG

ORG

P value

N

94

144

 

73

73

 

70

70

 

Sex, malea

61 (64.9)

105 (72.9)

0.24

50 (68.5)

48 (65.8)

0.86

48 (68.6)

46 (65.7)

0.86

Agea

67.0 (38–94)

67.0 (37–90)

0.73

67.0 (41–94)

69.0 (37–90)

0.66

66.5 (42–94)

65.0 (37–90)

0.76

NACa

7 (7.4)

19 (13.2)

0.24

5 (6.8)

8 (11.0)

0.56

5 (7.1)

7 (10.0)

0.76

Conversion surgerya

0 (0.0)

3 (2.1)

0.42

0 (0.0)

0 (0.0)

1.00

0 (0.0)

0 (0.0)

1.00

Alba

4.1 (2.4–5.2)

4.1 (2.1–5.2)

0.69

4.0 (2.4–5.2)

4.0 (2.1–4.9)

0.96

4.0 (2.4–5.2)

4.12 (2.1–4.9)

0.27

Hba

12.8 (5.0–17.1)

13.0 (5.3–18.0)

0.54

12.7 (5.8–17.1)

12.5 (5.3–17.7)

0.71

12.7 (5.8–17.1)

12.5 (5.0–17.7)

0.83

BMIa

22.4 (16.4–32.6)

22.2 (14.1–34.3)

0.69

22.4 (16.4–32.6)

22.2 (15.5–30.0)

0.93

22.4 (16.4–32.6)

22.2 (15.8–30.3)

0.84

ASA-PSa

1

11 (11.7)

10 (6.9)

0.43

6 (8.2)

7 (9.6)

0.92

6 (8.6)

6 (8.6)

1.00

2

70 (74.5)

115 (79.9)

 

56 (76.7)

57 (78.1)

 

53 (75.7)

54 (77.1)

 

3

13 (13.8)

19 (13.2)

 

11 (5.1)

9 (12.3)

 

11 (15.7)

10 (14.3)

 

CCIa

0

68 (72.3)

107 (74.3)

0.56

54 (74.0)

58 (79.5)

0.95

51 (72.9)

54 (77.1)

1.00

1

18 (19.1)

20 (13.9)

 

12 (16.4)

10 (13.7)

 

12 (17.1)

9 (12.9)

 

2

2 (2.1)

7 (4.9)

 

2 (2.7)

2 (2.7)

 

2 (2.9)

2 (2.9)

 

3

4 (4.3)

4 (2.8)

 

3 (4.1)

2 (2.7)

 

3 (4.3)

3 (4.3)

 

4

1 (1.1)

5 (3.5)

 

1 (1.4)

0 (0.0)

 

1 (1.4)

1 (1.4)

 

5

1 (1.1)

1 (0.7)

 

1 (1.4)

1 (1.4)

 

1 (1.4)

1 (1.4)

 

cTa

3

47 (50.0)

51 (35.4)

 < 0.05

32 (43.8)

35 (47.9)

0.74

30 (42.9)

30 (42.9)

1.00

4

47 (50.0)

93 (64.6)

 

41 (56.2)

38 (52.1)

 

40 (57.1)

40 (57.1)

 

cNa

0

26 (27.7)

14 (9.7)

 < 0.05

13 (17.8)

13 (17.8)

0.93

13 (18.6)

11 (15.7)

0.89

1

21 (22.3)

29 (20.1)

 

17 (23.3)

17 (23.3)

 

16 (22.9)

16 (22.9)

 

2

23 (24.5)

46 (31.9)

 

22 (30.1)

19 (26.0)

 

20 (28.6)

15 (40.0)

 

3

24 (25.5)

55 (38.2)

 

21 (28.8)

24 (32.9)

 

21 (30.0)

28 (20.0)

 

Tumour locationa

Lower

30 (31.9)

39 (27.1)

0.17

24 (32.9)

24 (32.9)

0.60

25 (35.7)

25 (35.7)

1.00

Middle

31 (33.0)

66 (45.8)

 

28 (38.4)

33 (45.2)

 

25 (35.7)

26 (37.1)

 

Upper

33 (35.1)

39 (27.1)

 

21 (28.8)

16 (21.9)

 

20 (28.6)

19 (27.1)

 

Circumferencea

Ant

17 (18.1)

29 (20.1)

0.32

15 (20.5)

14 (19.2)

0.944

15 (21.4)

12 (17.1)

0.98

Circ

8 (8.5)

25 (17.4)

 

8 (11.0)

11 (15.1)

 

7 (10.0)

8 (11.4)

 

Gre

9 (9.6)

14 (9.7)

 

8 (11.0)

6 (8.2)

 

8 (11.4)

7 (10.0)

 

Less

43 (45.7)

52 (36.1)

 

31 (42.5)

31 (42.5)

 

30 (42.9)

32 (45.7)

 

Post

17 (18.1)

24 (16.7)

 

11 (15.1)

11 (15.1)

 

10 (14.3)

11 (15.7)

 

Tumour typea

0

11 (11.7)

11 (7.6)

0.12

6 (8.2)

7 (9.6)

0.991

5 (7.1)

6 (8.6)

0.95

1

8 (8.5)

8 (5.6)

 

5 (6.8)

5 (6.8)

 

5 (7.1)

3 (4.3)

 

2

21 (22.3)

30 (20.8)

 

18 (24.7)

16 (21.9)

 

17 (24.3)

15 (21.4)

 

3

50 (53.2)

74 (51.4)

 

40 (54.8)

40 (54.8)

 

40 (57.1)

43 (61.4)

 

4

4 (4.3)

14 (9.7)

 

4 (5.5)

5 (6.8)

 

3 (4.3)

3 (4.3)

 

5

0 (0.0)

7 (4.9)

 

0 (0.0)

0 (0.0)

 

0 (0.0)

0 (0.0)

 

Operationa

Total gastrectomy

42 (44.7)

60 (41.7)

0.75

29 (39.7)

26 (35.6)

0.73

26 (37.1)

25 (35.7)

1.00

Lymphadenectomya

D2 or more

70 (74.5)

127 (88.2)

 < 0.05

58 (79.5)

64 (87.7)

0.26

56 (80.0)

61 (87.1)

0.36

Other organ resectiona

Total

10 (10.6)

44 (30.6)

 < 0.05

10 (13.7)

8 (11.0)

0.80

10 (14.3)

10 (14.3)

1.00

Liver

0 (0.0)

1 (0.7)

1.00

0 (0.0)

0 (0.0)

1.00

0 (0.0)

0 (0.0)

1.00

Pancreas

7 (7.4)

9 (6.2)

0.92

7 (9.6)

3 (4.1)

0.33

7 (10.0)

1 (1.4)

0.06

Spleen

9 (9.6)

34 (23.6)

 < 0.05

9 (12.3)

7 (9.6)

0.79

9 (12.9)

9 (12.9)

1.00

Transverse colon

1 (1.1)

5 (3.5)

0.46

0 (0.0)

0 (0.0)

1.00

0 (0.0)

1 (1.4)

1.00

Transverse mesocolon

0 (0.0)

3 (2.1)

0.42

1 (1.4)

1 (1.4)

1.00

1 (1.4)

0 (0.0)

1.00

Laparoscopic resection

63 (67.0)

46 (31.9)

 < 0.05

47 (64.4)

30 (41.1)

 < 0.05

45 (64.3)

29 (41.4)

 < 0.05

  1. Data are expressed as the median (range) for continuous variables and the number of cases (%) for categorical variables.
  2. PSM propensity score matching, MI multiple imputation, CC Complete cases, NAC neoadjuvant chemotherapy, Alb serum albumin level, Hb serum haemoglobin level, BMI body mass index, ASA-PS American Society of Anesthesiologists Physical Status, CCI Charlson Comorbidity Index, Ant anterior, Circ circular, Gre greater curvature, Less lesser curvature, Post posterior.
  3. aIndicates covariates to calculate the propensity score.
Back to article page