What is true about confounding factor?
Confounding factor is defined as one which is associated with both exposure and disease and is distributed unequally in study and control groups. (refer pg no:72 park 23 rd edition)
It is found equally between study and control groups
It itself is a risk factor for the disease
Confounding can be eliminated by selecting a small group
It is associated with either the exposure or the disease
Epidemiology