Mention some Assumptions related to NMA and the risk of bias

QNMA is based on several assumptions that must be verified before the analysis can be completed.

First, NMA is based on the same homogeneity assumption as pairwise Writing A Meta-Analysis.

Assumption assumes that trial outcomes are homogeneous, which indicates that the influence of possible modifiers for the included RCTs qNMA should be extremely restricted, guaranteeing that all study-related factors are homogeneous.

However, potential modifiers may still exist in practice, and they are not always assessed or even detectable.