Question

Town A and town B are both located in Massachusetts, both towns have approximately 100.000 residents, and their own water supply. Fluoride is added to the water supply of town A; nothing is added to the water supply of town B. The decision to add fluoride to town A’s water, and not Town B’s, was made using a random number table. Both towns are monitored and compared with regards to the occurrence of new cases of dental caries ( cavities) over a 5-year period.

a) Individual Preventive Randomized Controlled Trial

b) Community Preventive Randomized Controlled Trial

c) Individual Therapeutic Randomized Controlled Trial

d) Community Therapeutic Randomized Controlled Trial

Answer 1

In this experiment Fluoride is added to the water supply of town A; nothing is added to the water supply of town B. Both towns are monitored and compared with regards to the occurrence of new cases of dental caries ( cavities) over a 5-year period.

First of all, it is a community trial because it not done on any specific individuals the experiment s on a city. Second, it's not a clinical trial or therapeutic trail it's a preventive trail because here Fluoride is added to the water and then the researcher going to check any reduction in dental caries.

Answer - b) Community Preventive Randomized Controlled Trial