{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Week6_Epi_Application

# Of the 150 cases 70 reported having taken a drivers

This preview shows pages 3–4. Sign up to view the full content.

included in the study, 150 cases who had been in an accident and 300 controls who had not. Of the 150 cases, 70 reported having taken a driver's education class. Of the 300 controls, 170 reported having taken a driver's education class. Calculate and interpret the appropriate measure of association between driver's education and accidents. Accident No Accident Drivers Ed 70 170 No drivers Ed 80 130 Odds ratio = (A*D) / (B*C) = (70*130)/(80*170) =0.669 Taking a driver education class results in a 33% reduction in likelihood of having an automobile accident. The question arose as to whether gender might be an effect modifier of this association. When gender was assessed, the data looked like the following: Women Men Accident No Accident Accident No Accident

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Driver's Ed 10 50 60 120 No Driver's Ed 40 50 40 80 Perform the appropriate calculations to test for effect modification. Interpret your results. Odds ratio for women: Odds ratio = (A*D) / (B*C) = (10*50)/(50*40) =0.25 Odds ratio for men: Odds ratio = (A*D) / (B*C) = (60*80)/ (120*40) = 1 When we control for gender, we observe that, in case of women, taking a driver education class results in a 33% reduction in likelihood of having an automobile accident. Where as in case of men, odds ratio of 1 indicates that taking a driver education class does not results in reduction in likelihood of having an automobile accident References: Vliegenthart R, Geleijnse JM, Hofman A, et al. (February 2002). "Alcohol consumption and risk of peripheral arterial disease: the Rotterdam study" . Am J Epidemiol. 155 (4): 332–8.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page3 / 4

Of the 150 cases 70 reported having taken a drivers...

This preview shows document pages 3 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online