 more appropriate when the number of nontruncated RCTs in metaanalyses is relatively small (= weight of tRCTs in metaanalyses relatively large)

 more appropriate when the number of nontruncated RCTs in metaanalyses is relatively large (= weight of tRCTs in metaanalyses relatively small)

 more appropriate when true treatment effects are small (RCTs in metaanalyses likely to be underpowered)

 more appropriate when true treatment effects are large (RCTs in metaanalyses likely to be adequately powered)

 more appropriate in the presence of considerable publication bias

 more conservative bias estimation

 more appropriate when proportion of trials in metaanalyses without formal stopping rule is large
 
 trial sample separate/independent from tRCT(s) facilitates statistical analysis
 