True about confounding factor: (A) It is found equally between study and the control groups, (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 disease
Answer is A. .a "confounding factor"is defines as one which is associated both with exposure and disease and is distributed unequally in study and control groups.a cofounding factor by itself is a risk factor for the disease independently of any association. ref:park&;s textbook,ed22,pg no 63