Epidemiology — MCQs

A researcher is investigating whether there is an association between the use of social media in teenagers and bipolar disorder. In order to study this potential relationship, she collects data from people who have bipolar disorder and matched controls without the disorder. She then asks how much on average these individuals used social media in the 3 years prior to their diagnosis. This continuous data is divided into 2 groups: those who used more than 2 hours per day and those who used less than 2 hours per day. She finds that out of 1000 subjects, 500 had bipolar disorder of which 300 used social media more than 2 hours per day. She also finds that 400 subjects who did not have the disorder also did not use social media more than 2 hours per day. Which of the following is the odds ratio for development of bipolar disorder after being exposed to more social media?

Recently, clarithromycin was found to have an increased risk of cardiac death in a Danish study. This study analyzed patients who were previously treated with clarithromycin or another antibiotic, and then they were followed over time to ascertain if cardiac death resulted. What type of study design does this represent?

According to WHO International Health Regulations, which disease requires immediate notification due to its epidemic potential and international spread risk?

A well of contaminated water resulting in an epidemic of acute watery diarrhea is a typical example for:

On republic day, a camp was organized and people were screened for Hypertension by checking BP and for diabetes by checking their BMI and Blood sugar level, which level of prevention is this?

Babesiosis is most commonly transmitted by:

In a disease with 100% mortality, what is the relationship between incidence and prevalence?

Base population for a population based cancer registry is:-

Tuberculosis control is achieved when -

Test quoted as highly sensitive means?