An Advertisement Maintains That Zip Code Affects Length of Life

An advertisement maintains that zip code affects length of life. If outcomes research were designed to explore this geographical difference, what variables would be most useful in understanding the outcome of length of life?

A) Other outcome variables, such as quality of life and consumer perceptions
B) The availability of parking near clinics, a structural variable
C) The time it actually takes in both areas to transport a patient to an emergency room, a structural variable
D) The prevalence of ethnically associated health problems, a structural variable
E) Physicians' clinical judgment, a process variable
F) The presence of standard nursing care plans in the hospitals, a process variable
G) The number of specialist physicians per 1000 population in each area, a structural variable
H) The number of primary care physicians per 1000 population in each area, a structural variable