Answer Happy

3. In a case control study examining the relationship between development disorders and prenatal exposure to cocaine, the hospital records of 1000 infants diagnosed with a developmental disorder and 1000 control infants were inspected for proven maternal cocaine abuse. As the following table shows, of the 1000 children with a developmental disorder, 800 were born to mothers known to have abused cocaine during their pregnancy, compared to 300 of the control infants.
Maternal Cocaine use Present Absent Totals Development Disorder Present Absent 800 300 200 700 Totals 1100 900 2000 1000 1000 A. What is the absolute risk of developmental disorders among infants exposed to cocaine in utero? B. What is the OR of a developmental disorder given exposure to cocaine? C. What is the RR of a developmental disorder given exposure to cocaine? D. What is the prevalence of developmental disorder? E. What is the attributable risk (AR) for developmental disorder given the mother was using cocaine and what does it mean?