Question

1. An investigator finds a positive correlation between per capita alcohol consumption and mortality rates for breast cancer across 20 different countries. In order to investigate this relationship further, the investigators conduct a study selecting 200 women with breast cancer and comparing them with 200 women without breast cancer. The women are compared with respect to earlier drinking habits. The design of this study is best described as:

a. Case-Control

b. Prospective cohort

c. Retrospective cohort

d. Ecologic

Answer 1

Option A- Case control Study-

A case–control study is a type of study in which 2 existing groups differing in result are identified and compared based on some supposed causal attribute.

Here,The 2 Groups which differ in Result or Outcome are-

1.Group with Breast Cancer

2.Group without Breast Cancer

Supposed Causal Attribute-Alcoholism

A prospective cohort study: study that follows a group of similar individuals who differ in certain factors under study for prolonged period of time, to determine how these differed factors affect rates of a certain outcome.

Retrospective cohort studies : investigator looks back in time to Findout whether the risk of disease was different between exposed and non-exposed patients.

Ecological studies are studies used to measure prevalence and incidence of disease