Perhaps you should try some spelling variations:
significant improvements » significant improvement (Expand Search)
significantly predicted » significantly reduced (Expand Search), significantly reduce (Expand Search), significant predictor (Expand Search)
improvements decrease » improvements increased (Expand Search), improvements across (Expand Search)
predicted decrease » predicted secreted (Expand Search), reported decrease (Expand Search)

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

• Removing quotes may allow a broader search: (( significantly predicted decrease ) OR ( significant improvements decrease ))*.