L8 Reality check

In which of the following study designs are the exposure and outcomes are measured at a certain point or period of time?

The summary measure used in cross-sectional studies is:

State True or False. Cross-sectional studies are the best study designs to establish temporal trend (i.e., outcome occurs after exposure.

State True or False. Cohort studies can be prospective or retrospective.

Of 1000 people in the general population, 60 people developed a viral infection in 6 months. What is the incidence rate of the viral infection in the population?

State True or False. Risk is the main summary measure used in case-control studies.

Of 1000 people in the general population, 80 people developed a viral infection in 6 months. What are the odds of developing the viral infection in 6 months in the population?

State True or False. The fundamental difference between randomised controlled trial design and other study designs is how participants are assigned to intervention and control.

State True or False. Reverse causality (i.e., the outcome leads to exposure) can be a major concern while making causal inference in randomised controlled trials.

Of 1000 people in the general population, 80 people developed a viral infection in 6 months. What is the risk of developing the viral infection in 6 months in the population?