x\" Unit 6-MPH5512-Oct 09 2c D Epidemiology Essertials Quiz eMedia/DRPH8170/epid

Question

x" Unit 6-MPH5512-Oct 09 2c D Epidemiology Essertials Quiz eMedia/DRPH8170/epidemiologyEssentialsQuizfindex.asp × G A study is cond A study is conducted to determine whether or not individuals with lung cancer are more likely to have smoked than individuals of the same age/gender who do not have lung cancer. 1000 cases and 1000 controls were recruited into this study, and their smoking history was assessed. 400 lung cancer patients and 200 controls were classified as smokers. What is the odds ratio? 2. 2.7 1.5 2.0 0.4

Explanation / Answer

Odds Ratio Calculation:

Ill people: who smoked and got cancer/ people who did not smoke

= 400 / 600

People who are not ill: people who smoked / people who did not

= 200/800

Dividing the two results, we get 400 / 600 / 200/800

2/3/1/4

8/3

= 2.666

2.7

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