FIGURE 2.

Meta‐analysis of the association between tumor spread through air space and recurrence‐free survival. (a) Forest plot of meta‐analysis in the whole population. (b) Forest plot of meta‐analysis in the subgroup of limited resection and lobectomy. (c) Filled funnel plot using the “trim‐and‐fill” method. Dark circles indicate observed studies, hollow circles in squares indicate missed studies. (d) Sensitivity analysis in the whole population. (e) Sensitivity analysis in the subgroup of limited resection. (f) Sensitivity analysis in subgroup of lobectomy