2.7 Subgroup analysis and sensitivity analysis
Subgroup analysis and sensitivity analysis play an important role in
order to explore the source of heterogeneity. Among them, methodology,
statistics and clinical characteristics are all potential sources that
may constitute heterogeneity. When there’s a huge difference in the
results of clinical trials and the heterogeneity is significant, we
removed one trial that is significantly different from the other trials
and then combined the remaining studies to compare the results before
and after the trial.