Outcomes Research in a Hospital Could Address Interactions Among Which

Outcomes research in a hospital could address interactions among which of the following general groups of variables?

A) Those that existed prior to treatment, such as narrative health histories
B) Those that reflect surroundings, such as the size of family waiting rooms
C) Those that reflect perceived outcome, such as quality of life
D) Those that pertain to staff, such as levels of education and training
E) Those that reflect physical outcome, such as patient survival