Which of these odds ratios has a bigger magnitude Odds Ratio

Which of these odds ratios has a bigger magnitude? Odds Ratio = 1.25 or Odds Ratio = 0.80?

Select one:

a. OR=1.25

b. OR=0.80

c. They are the same.

d. You cannot tell.

Solution

As

1/1.25 = 0.80

[Meaning, they are reciprocals of each other], and odds ratios that are reciprocals of each other are the same, then:

OPTION C: THEY ARE THE SAME.