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Table 2 Subgroup analysis of the prognosis of extrahepatic cholangiocarcinoma at early stage

From: Does high-grade dysplasia/carcinoma in situ of the biliary duct margin affect the prognosis of extrahepatic cholangiocarcinoma? A meta-analysis

Subgroup Studies included Overall survival
Participants Effect model OR (95% CI) P
pN0M0, HGD/CIS vs. R0
1 year 4 354 Fixed 0.54 (0.21–1.36) 0.19
2 years 4 354 Fixed 0.75 (0.35–1.58) 0.44
3 years 4 354 Fixed 0.74 (0.40–1.37) 0.34
pN0M0, HGD/CIS vs. INV
1 year 4 85 Fixed 3.47 (1.09–11.02) 0.03
2 years 4 85 Fixed 9.12 (2.98–27.93) < 0.001
3 years 4 85 Fixed 9.17 (2.95–28.55) < 0.001
  1. P value is statistically significant