What is the absolute risk of disease in people with the factor?

Cannot be computed from the data given

Only odds are calculated as a measure of incidence from case-control studies. In a case control study one is not sure about all the persons who had the particular exposure at the time in question and therefore the total number of persons at risk is unknown. Likewise, the duration of exposure to the risk factor in most instances and therefore rates cannot be calculated. The odds however give a measure that is numerically close to the risk.