Quality of life Vs. Life Quality
In the context of the following excerpt, what expression should I use? And why?
The husband's role is a fundamental element for the sick wife's well-being and life quality/quality of life.
Note that I gave the phrase a slight nominal twist for copyright concerns, and it should be used in an Academic context.
You want quality of life
How good or bad a person's life is
Generally, it's the stock term for the happiness and healthiness of an individual. Do note that it is "life" and not "live".