Table 2 Postoperative 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

pT

0

0 (0.0)

1 (0.7)

0.54

0 (0.0)

1 (1.4)

0.90

0 (0.0)

1 (1.4)

0.78

1

11 (11.7)

10 (6.9)

 

7 (9.6)

6 (8.2)

 

6 (8.6)

5 (7.1)

 

2

18 (19.1)

22 (15.3)

 

15 (20.5)

16 (21.9)

 

16 (22.9)

12 (17.1)

 

3

39 (41.5)

66 (45.8)

 

28 (38.4)

31 (42.5)

 

27 (38.6)

32 (45.7)

 

4

26 (27.7)

45 (31.2)

 

23 (31.5)

19 (26.0)

 

21 (30.0)

20 (28.6)

 

pN

0

39 (41.5)

36 (25.0)

 < 0.05

31 (42.5)

22 (30.1)

0.39

29 (41.4)

22 (31.4)

0.55

1

19 (20.2)

27 (18.8)

 

14 (19.2)

16 (21.9)

 

14 (20.0)

14 (20.0)

 

2

17 (18.1)

35 (24.3)

 

10 (13.7)

16 (21.9)

 

9 (12.9)

14 (20.0)

 

3

19 (20.2)

46 (31.9)

 

18 (24.7)

19 (26.0)

 

18 (25.7)

20 (28.6)

 

Tumour diameter

mm

48 (8–140)

53 (0–230)

0.24

50 (18–140)

48 (0–230)

0.54

50.5 (18–140)

48 (0–149)

0.39

Differentiation

tub

42 (44.7)

44 (30.6)

0.22

35 (47.9)

25 (34.2)

0.25

35 (50.0)

22 (31.4)

0.15

pap

3 (3.2)

5 (3.5)

 

1 (1.4)

1 (1.4)

 

1 (1.4)

2 (2.9)

 

por

45 (47.9)

84 (58.3)

 

34 (46.6)

39 (53.4)

 

31 (44.3)

39 (55.7)

 

sig

0 (0.0)

3 (2.1)

 

0 (0.0)

3 (4.1)

 

0 (0.0)

2 (2.9)

 

muc

4 (4.3)

7 (4.9)

 

3 (4.1)

4 (5.5)

 

3 (4.3)

4 (5.7)

 

None

0 (0.0)

1 (0.7)

 

0 (0.0)

1 (1.4)

 

0 (0.0)

1 (1.4)

 

Adjuvant chemotherapy

56 (59.6)

103 (71.5)

0.08

45 (61.6)

49 (67.1)

0.60

44 (62.9)

52 (74.3)

0.20

Medication

TS1

51 (92.2)

95 (91.1)

0.77

40 (88.9)

46 (89.8)

0.47

39 (88.6)

50 (96.2)

0.30

UFT

5 (7.8)

8 (8.9)

 

5 (12.1)

3 (11.2)

 

5 (11.4)

2 (3.8)

 

Duration

Month

12 (0–33)

12.0 (0–37)

0.34

12 (1–18)

12 (1–37)

0.43

12 (1–18)

12 (1–37)

0.54

Follow up period

Month

60 (3–89)

55.5 (0–94)

0.48

59 (3–86)

56 (0–94)

0.71

60 (3–86)

57 (40–94)

0.81

Death cases

n

22 (23.4)

52 (36.1)

0.05

19 (26.0)

23 (31.5)

0.58

17 (24.3)

26 (37.1)

0.14

Recurrence cases

n

18 (19.1)

53 (36.8)

 < 0.05

17 (23.3)

23 (31.5)

0.35

15 (21.4)

24 (34.3)

0.13

  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, tub tubular, pap papillary, por poor differentiated, sig sigmoid, muc mucinous, TS1 Titanium silicate 1, UFT uracil-tegafur.
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