Question

To study the link between diets high in trans fatty acids (TFA) and early heart disease, you identify 50 patients with early heart disease and find that 22 had diets high in TFA. You then gather 150 comparators who do not have early heart disease but are of similar age, sex, socioeconomic status and determine that 50 had diets high in TFA.

What is the odds ratio?

Round your answer to the nearest tenth. For example, if you report 2.556, round your answer to 2.6.

Answer 1

To study the link between diets high in trans fatty acids (TFA) and early heart disease, you identify 50 patients with early heart disease and find that 22 had diets high in TFA. You then gather 150 comparators who do not have early heart disease but are of similar age, sex, socioeconomic status and determine that 50 had diets high in TFA.

What is the odds ratio?

	Heart Diseased(case)	Non-disease(control)
Exposed(High in TFA)	A = 22	B = 50
Non exposed (Not high in TFA)	C = 28	D = 100
Total	50	150

Odds ratio is used in case control study

Odds ratio formula = A x D / B x C

= 22 x 100 / 50 x 28

= 1.57