In a cohort study of throat cancer, 20,000 men and women were followed and observed for 10 years; information was collected regarding their alcohol consumption and whether or not they developed throat cancer. throat ca+ throat ca- alcohol+ 9200 5163 14,363 alcohol- 2700 2937 5637 11,900 8100 20,000 what is the risk of throat cancer among persons who drank alcohol? 3.41 per 1000 640.53 per 1000 1.71 per 100 171.54 per 100