B
Figure 2. Forest plot of HR for prediction of OS (A) and PFS (B) by PLR
of laryngeal cancer patients.
3.3 Publication bias and Sensitivity analysis
Sensitivity analysis was used to assess the effect of each article on
overall HR. As the result showed in figure 3 that deletion any article
had no effect on the final OS. Published bias was evaluated by Begg’ s
and Egger’ s test. We did not observe publication bias for OS, the
result of publication bias was
Pr>|z|=1.000 for Begg’s test and
P>|t|=0.620 for Egger’s test. The
publication bias of PFS was not carried out in the limited research.