Case control study estimates:

Correct option is B

A case-control study is an observational study that compares individuals with a disease (cases) to those without the disease (controls) to estimate the association between an exposure and the outcome.
· (a) Only odd’s ratio – Incorrect, because while odds ratio (OR) is the primary measure of association in case-control studies, attributable risk can also be estimated under specific conditions.
· (b) Odd’s ratio and attributable risk – Correct, as odds ratio (OR) is commonly used to measure the likelihood of an outcome based on exposure, and attributable risk helps estimate the proportion of disease cases due to the exposure.
· (c) Relative risk and attributable risk – Incorrect, because relative risk (RR) is not directly calculable from case-control studies, as the incidence of disease is not measured directly.
· (d) Only relative risk – Incorrect, as relative risk is a measure used in cohort studies, not in case-control studies.