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Table 2 Subgroup analysis for the influence of tumor size on overall survival after pancreatic ductal adenocarcinoma resection

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

Subgroup

No. of studies

HR

95% CI

P-value

I2 (%)

Single centre studies

 Univariate analysis

8

1.52

1.39, 1.67

< 0.001

29

 Multivariate analysis

13

1.53

1.22, 1.91

< 0.001

76

Multicentre studies

 Univariate analysis

7

1.54

1.36, 1.74

< 0.001

0

 Multivariate analysis

7

1.67

1.41, 1.99

< 0.001

51

Western studies

 Univariate analysis

8

1.46

1.34, 1.59

< 0.001

0

 Multivariate analysis

11

1.55

1.25, 1.92

< 0.001

87

Eastern studies

 Univariate analysis

7

1.82

1.55, 2.15

< 0.001

0

 Multivariate analysis

10

1.62

1.40, 1.87

< 0.001

35

  1. CI confidence interval, HR hazard ratio