Question

If 3 out of 10 mammalian cell cultures exposed to ultraviolet (UV) radiation developed chromosomal abnormalities while 9 out of 10 mammalian cell cultures developed chromosomal abnormalities when exposed to UV radiation plus a common NSAID (nonsteroidal anti-inflammatory drug).

a. What is the type of study design?
b. Which parameter (s) can be determined? Calculate it.
c. Explain the results.

Answer 1

a) Observational Study

b) Risk in observational study

RR = 9/10/3/10 = 3.0

c) Relative risk when exposed to a common NSAID is 3 out of 10 people

Explanation:

A) This is observational study

b) The parameter determined here is the risk in observational study

RR = 9/10/3/10 = 3.0

c) Relative risk of mammalian cell to develop chromosomal abnormalities when exposed to a common NSAID is 3 out of 10 people