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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