The investigators now wish to examine those without hepatiti

The investigators now wish to examine those without hepatitis B infection. Among the 211 individuals with no Hep B infection, there were 84 individuals with liver cirrhosis, 43 of whom were drinkers. Of the 127 individuals without liver cirrhosis, 65 were non-drinkers. What is the odds ratio of drinking and liver cirrhosis among those without hepatitis B infection? Remember to round to the hundreths place.

Select one:

a. 2.45

b. 1.10

c. 3.87

d. 7.66

Solution

Note that

odds ratio = N(With Cirrhosis Drinker) N(Without Cirrhosis Non Drinker) / [N(With Cirrhosis Non Drinker) N (Without Cirrhosis Drinker)

Thus,

Odds ratio = 43 * 65 / [41*62]

= 1.10 [OPTION B]