Perhaps you should try some spelling variations:
significantly mediated » significantly predicted (Expand Search), significantly related (Expand Search), significantly reduced (Expand Search)
significantly impaired » significantly improved (Expand Search), significantly improve (Expand Search), significantly improves (Expand Search)
mediated decrease » mediated defense (Expand Search), estimated decrease (Expand Search), mediated diseases (Expand Search)
impaired decrease » marked decrease (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( significantly mediated decrease ) OR ( significantly impaired decrease ))*.