What is the estimated odds ratio of cases when analyzing this study as a matched case-control study design? Use the information from a case-control study table. Exposure Status by Disease Status
$$\begin{array}{lll}\text{ Pair no. }& \text{ Cases }& \text{ Controls }\\ 1& \text{ Exposed }& \text{ Unexposed }\\ 2& \text{ Exposed }& \text{ Exposed }\\ 3& \text{ Unexposed }& \text{ Exposed }\\ 4& \text{ Exposed }& \text{ Unexposed }\\ 5& \text{ Exposed }& \text{ Unexposed }\\ 6& \text{ Unexposed }& \text{ Exposed }\\ 7& \text{ Exposed }& \text{ Exposed }\\ 8& \text{ Unexposed }& \text{ Unexposed }\\ 9& \text{ Exposed }& \text{ Unexposed }\\ 10& \text{ Unexposed }& \text{ Unexposed }\\ 11& \text{ Exposed }& \text{ Exposed }\\ 12& \text{ Unexposed }& \text{ Exposed }\\ 13& \text{ Exposed }& \text{ Unexposed }\\ 14& \text{ Enposed }& \text{ Unexposed }\\ 15& \text{ Exposed }& \text{ Eed }\end{array}$$

A) 0.50
B) 0.67
C) 1.00
D) 2.00
E) 2.25

Matched Case-Control

A study design where each case (individual with the outcome of interest) is paired with one or more controls (individuals without the outcome) who share similar characteristics, improving comparison.

Odds Ratio

is a measure of association between an exposure and an outcome, representing the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring without that exposure.

Exposure Status

The classification of individuals or groups in a study according to their level or type of exposure to a factor of interest, which may be related to disease outcomes.