Type of study in risk factor associated with multiple diseases ?
Coho study
Case control study
Ecological study
Clinical trial
Ans. is 'a' i.e., Coho study In case control study we proceed from effect to cause by taking history. It is possible to take history of exposure of multiple risk factors - multiple risk factors can be identified for a single disease. In coho study we sta by exposing the study coho to a paicular risk factor and then follow up the coho for the occurence of disease. So, several possible outcomes related to exposure can be studied simultaneously - we can study the association of the suspected factor with many other disease in addition to the one under study. Case control study - can identify multiple risk factors. Coho study - can identify multiple outcome (disease).