A person wants to study a disease ‘x’ and fat consumption. He obtained data for number of people affected with ‘x’ from the government and the details of fat consumption from food industry. Type of study is –

Social & Preventive Medicine

A person wants to study a disease ‘x’ and fat consumption. He obtained data for number of people affected with ‘x’ from the government and the details of fat consumption from food industry. Type of study 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