True about confounding factor-: (A) It is found equally between study and control, (B) It is itself a risk factor for the disease, (C) Confounding can be eliminated by selecting a small group, (D) It is associated with either the exposure or the
Answer is B. Ans. is 'b' i.e., It is itself a risk factor for the disease Confounding factor has following characteristics i) Associated with the both exposure and the disease ii) Distributed unequally in study and control groups iii) Itself is a risk factor for the disease.