A change for the better/worse
Definition 1 of 1
Pro Tip 1/3Positive or Negative
Indicates whether an outcome or result is beneficial (better) or harmful (worse). 
Quitting smoking led to a change for the better in his stamina.
Pro Tip 2/3Transformative Context
Used when discussing events or actions that cause a significant shift in a situation. 
The new policy resulted in a change for the better in employee productivity.
Pro Tip 3/3Subjectivity
What is considered better or worse can vary based on personal or cultural perspective. 
To him, moving out of the city was a change for the worse, but she loved it.