The combined results showed a marginally significant difference (OR, 2.234; 95% CI, 1.000 to 4.991; I 2 = 73.0%; P ch i2 = 0.005) between the T2a group (20.8%) and the T2b group (30.0%) ( Figure 7 ), but there was a statistically significant difference in the number needed to treat (NNT, 3.4; 95% CI NNT 2.8 to NNT 4.3).
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Prognostic Significance of Tumor Location in T2 Gallbladder Cancer: A Systematic Review and Meta-Analysis.
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