<prompt> In a study done to establish smoking as a risk factor for a disease. 30 out of 50 smokers developed the disease while 10 out of 50 non smokers developed the disease. Odd;s ratio is?36510  <response>: .odd;s ratio cross product ratiois calculated as the ratio between total no of people exposed who developed diseasea by people exposed and no diseseb with that of people who had no exposure ,but developed the diseasec,by people without exposure,without diseased.here it is 30by 50 divided by 10 by 50 .equals 3ref;park;s textbook of preventive and social medicine,22 nd edition,pg no 70 