<prompt> True about confounding factorIt is found equally between study and the control groupsIt is itself a risk factor for the diseaseConfounding can be eliminated by selecting a small groupIt is associated with either the exposure or the disease  <response>: .a confounding factoris 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 