Oregon Revised Statutes Evidence and Witnesses § 40.172

(1) In any proceeding, any party may introduce evidence establishing a pattern, practice or history of abuse of a person and may introduce expert testimony to assist the fact finder in understanding the significance of such evidence if the evidence:

(2) This section may not be construed to limit any evidence that would otherwise be admissible under the Oregon Evidence Code or any other provision of law.

(3) As used in this section, “abuse” has the meaning given that term in ORS 107.705.