Question
The following data are from a retrospective cohort study on cocaine use during pregnancy and perinatal outcomes among singleton births in 1988 (Handler et al. Cocaine use during pregnancy: perinatal outcomes. Am J Epidemiol 1991;133:818-25).
Table 1. Low birth weight and cocaine use.
Low Birth Weight
|
Normal Birth Weight
|
Total
| |
Cocaine Users
|
289
|
399
| |
Cocaine Nonusers
|
1073
| ||
Total
|
17368
|
A. Fill out the missing cells in Table 1.
B. What is the risk of low birth weight among cocaine users?
C. What is the relative risk of low birth weight among cocaine users versus cocaine non-users?
D. Provide an interpretation for the relative risk you calculated in part C.
