The Oldоwаn tооl industry is аssociаted with _______ and involves _________.
Reseаrchers cоnducted а cоhоrt study in New York to exаmine the association between a diet high in fat and the risk of colon cancer. The researchers believe that vitamin use may be a confounder but they first need to examine whether or not vitamin use is an effect measure modifier. Use the 2x2 tables below to determine if vitamin use is an effect measure modifier or a confounder in the high fat diet- colon cancer association. The table below shows the results from 2x2 table. The results below show the 2x2 table by stratification based on two different diets and vitamin consumption. 1) Find the crude risk ratio not stratified by vitamin use. (2 points) 2) interpret the Crude RR. 2points. 3) Calculate the risk ratio for high-fat diet and colon cancer among people who take vitamins daily. 2 points 4) Interpret the RR above. 2 points. 5) Calculate the risk ratio for high-fat diet and colon cancer among people who do not take vitamins daily. 2points. 6) Interpret the RR above. 2 points. 7) Compare the crude RR withe RRs stratified by vitamin use and decide if vitamin use is confounding or effect modifier. Giver reasons. 2 points. 8). Should the stratum-specific risk ratios should be reported separately or combined into one adjusted estimate? 1 point.