Fig. 4.

Comparison of DCR (disease control rate) of gefitinib in combination with chemotherapy versus gefitinib alone. (A) The forest plot shows the OR (Odds Ratio) of DCR of gefitinib in combination with chemotherapy versus gefitinib alone. OR > 1 indicates gefitinib in combination with chemotherapy has higher probability of DCR as compared with gefitinib alone. (B) Sensitivity analysis was performed by omitting one study at each analysis. The result of each analysis is also presented as the forest plot. (C) The Egger's regression test and (D) Funnel plot were used to detect publication bias.