Interpret this odds ratio in
one sentence.
Homework Answers
Odds ratio is the ratio of odds . It refers to the ratio of the odds of an event occurring in the exposed group versus the unexposed group.
Odds ratio = (a/c) / (b/d) or (a×d) / ( b×c)
a = number of exposed to cats in childhood and had allergy = 20
b = number of exposed to cats in childhood, but does not have allergy = 70
c = number of unexposed to cats and have allergy = 80
d= number of unexposed to cats and also does not have allergy = 30
Odds ratio = ( a/c) / ( b/d )
= (20/80 ) / (70/ 30)
= 0.25 / 2.33
0.107
The correct option is 0.11
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Interpret this odds ratio in
one sentence.
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