In a study to establish smoking as a risk factor for disease, 30 out of 50 smokers developed disease while as 10 out of 50 non smokers developed disease. The Odds ratio is:

Social & Preventive Medicine

In a study to establish smoking as a risk factor for disease, 30 out of 50 smokers developed disease while as 10 out of 50 non smokers developed disease. The Odds ratio is:

A study is to be conducted with regards to the fat content…

'There has been a gradual increase in number of non-communicable disease cases…

All of the following are done to remove Confounding except