Perhaps you should try some spelling variations:
significantly preferred » significantly predicted (Expand Search), significantly differed (Expand Search), significantly restored (Expand Search)
significantly impaired » significantly improved (Expand Search), significantly improve (Expand Search), significantly improves (Expand Search)
preferred decrease » reported decrease (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 preferred decrease ) OR ( significantly impaired decrease ))~.