anecdotally

adjective

1. pertaining to, resembling, or containing anecdotes: an anecdotal history of jazz.
2. (of the treatment of subject matter in representational art) pertaining to the relationship of figures or to the arrangement of elements in a scene so as to emphasize the story content of a subject.Compare narrative(def 7).
3. based on personal observation, case study reports, or random investigations rather than systematic scientific evaluation: anecdotal evidence.

adjective

1. containing or consisting exclusively of anecdotes rather than connected discourse or research conducted under controlled conditions