Perhaps you should try some spelling variations:
significantly impaired » significantly impairs (Expand Search), significantly improved (Expand Search), significantly improve (Expand Search)
significant increases » significant increase (Expand Search), significantly increased (Expand Search), significant decrease (Expand Search)
increases decrease » increased release (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: (( significant increases decrease ) OR ( significantly impaired decrease )).