For assembling cohos for Coho study, all of the following considerations are considered except
The diagnostic and eligibility criteria of the disease must be defined beforehand; this will depend upon the availability of reliable methods for recognizing the disease when it develops. The groups are followed, under the same identical conditions, over a period of time to determine the outcome of exposure in both the groups. Remaining all options are considerants of coho study.
The coho must be free from the disease under the study
Study and control cohos should be equally susceptible to disease under study
Both groups should be comparable in respect of all the possible variable
The diagnostic and eligibility criteria of the disease must be defined after the staing of research
Classification, Coho Study