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Table 1 The main characteristics of included studies

From: Impact of tumor size on survival of patients with resected pancreatic ductal adenocarcinoma: a systematic review and meta-analysis

Reference

Year

Country

N

TS > 2.0 cm, n (%)

TRPD/DP/TP

R0 R, n (%)

LNM, n (%)

PNI, n (%)

PTD, n (%)

MOS (Months)

5-yr OS (%)

Meyer [9]

2000

Germany

91

67/86 (77.9)

−/−/−

93 (100)

66 (72.5)

41 (45.1)

14 (16.3)

16.8

10.5

Ahmad [10]

2001

USA

116

70/94 (74.4)

−/−/−

88 (75.8)

73 (62.9)

61 (52.5)

16

19

Kim [11]

2006

USA

70

50 (71.4)

68/2/0

40 (57.1)

46 (65.7)

26 (37.1)

21

19

Smith [12]

2008

UK

109

81 (74.3)

109/0/0

80 (73.3)

88 (80.7)

36 (33.0)

13.9

Chiang [13]

2009

Taiwan,

159

123 (77.3)

−/−/−

114 (71.6)

95 (59.7)

32 (20.1)

12.5

Chang [14]

2009

Australia

365

281 (76.9)

295/70/0

233 (63.8)

217 (59.5)

256 (70.1)

98 (26.8)

16.8

11.4

Kato [15]

2009

Japan

176

148 (84.1)

176/0/0

115 (65.3)

123 (69.8)

145 (82.3)

11 (6.2)

9.9

12.3

Massucco [16]

2009

Italy

77

60 (77.9)

63/0/14

59 (76.6)

59 (76.6)

58 (75.3)

50 (64.9)

16.5

Bhatti [17]

2010

UK

84

78 (92.8)

84/0/0

49 (58.3)

56 (66.6)

24 (28.5)

22

13

de Jong [5]

2011

USA

1697

1279 (75.4)

1640/0/57

1213 (71.8)

1280 (75.4)

1126 (66.3)

649 (38.2)

18.3

21.2

Cannon [18]

2012

USA

245

213 (86.9)

220/20/0

184 (75.1)

72 (29.4)

18.3

Petermann [19]

2013

Switzerland

86

76 (88.3)

86/0/0

89 (68.6)

72 (83.7)

16.8

Yamada [20]

2013

Japan

390

312 (80.0)

288/71/31

277 (71.0)

Buc [21]

2014

France,

306

242/45/19

195 (72.5)

214 (71.3)

212 (83.8)

34

32

Elberm [22]

2015

UK

1070

1070/0/0

482 (45.9)

757 (70.7)

18.5

Iwagami [23]

2015

Japan

39

27 (69.2)

−/−/−

14 (35.9)

34 (87.2)

3 (7.6)

Liu [24]

2015

USA

411

242 (58.9)

411/0/0

379 (92.2)

223 (54.3%)

150 (36.5)

Okumura [25]

2015

Japan

230

155/66/9

190 (82.6)

135 (58.7).

33 (14.3)

Yamamoto [26]

2015

Japan

195

156 (80.0)

123/61/11

138 (70.7)

145 (74.3)

108 (55.3)

27.1

34.5

Lin [27]

2016

China

233

189 (81.1)

233/0/0

196 (84.1)

161 (69.1)

147 (63.1)

19.0

Abe [28]

2017

Japan

355

273 (76.9)

215/98/22

282 (79.4)

223 (62.8)

282 (79.4)

137 (38.5)

Ansari [29]

2017

USA

15,398

12,725 (82.6)

−/−/−

16.1

Chikamoto [30]

2017

Japan

138

66 (47.8)

138/0/0

46 (33.3)

10 (7.2)

Marchegiani [6]

2017

Italy, USA

1507

1183 (78.5)

1179/268/59

840 (55.7)

1149 (76.2)

1376 (91.3)

468 (31.1)

26.0

Kurata [31]

2017

Japan

90

41 (45.6)

−/−/−

31 (34.4)

Le [32]

2017

USA

93

70/86 (81.3)

93/0/0

78 (84.7)

50 (53.8)

40.6

Watanabe [33]

2017

Japan

122

98 (87.5)

73/47/2

122 (100)

62 (55.3)

6 (4.9)

21

27

Yu [34]

2017

China

93

32 (34.4)

−/−/−

89 (96.6)

49 (52.6)

52 (55.9)

36 (38.7)

  1. UK United Kingdom, PNI peri-neural invasion, TS tumor size, LNM lymph node metastasis, PTD poor tumor differentiation, MOS median overall survival, TR type of resection, PD pancreaticoduodenectomy, DP distal pancreatectomy, TP total pancreatectomy, R0 R R0 resection