Table 1: Low birth weight and cocaine use.
Low Birth Weight
|
Normal Birth Weight
|
Total
| |
Cocaine Users
|
110
|
289
|
399
|
Cocaine Nonusers
|
1073
|
15896
|
16969
|
Total
|
1183
|
16185
|
17368
|
A. Calculate the attributable proportion among the exposed of low birth weight from cocaine
use among the users. You might try out both formulas we presented in class and compare the
results.
B. Interpret the APe you calculated in part A.
C. What is the attributable proportion in the total population for low birth weight due to cocaine
use in this population? Include an interpretation of your answer.
D. In the state of California, 2% of the women with low birth weight infants use cocaine. What
is the attributable proportion in the total population for low birth weight due to cocaine use in
California? Assume that measures of risk from the table in the previous problem are
applicable to women in California, but does not represent the prevalence of the exposure in
California. Give an interpretation of your answer, and explain why it is different than the
answer in part C.
E. What would the APt be if 50% of women with low birth weight infants in California were
cocaine users?
