http://korma.wmflabs.org/browser/scr-backlog.html lists the "Oldest open Gerrit changesets without code review":
In T132421 we decided that we'd like to have something similar on wikimedia.biterg.io.
Currently Kibana's "Gerrit Backlog > Backlog" widget lists any open patches regardless of CR status (e.g. https://gerrit.wikimedia.org/r/#/c/186610/ is included on 2016-11-21 which is CR-2). Find out if this could be adjusted somehow e.g. by filters or a separate widget using different indexes.
(I'd expect that once this widget existed it would also allow filtering by affiliation.)