Stratified analysis Age (y) Total Alcohol No Alcohol % d. Calculate the odds ratio of the relationship between alcohol drinking and liver cancer after stratifying by age i.e. Calculate the summary MH_OR of developing dental caries across age groups Total marks =25] Exposed (5) Assignment 40 70 35 35 50 Alcohol Liver cancer Controls Yes 30 18 No 70 82 Stratification by age yields the following results Total Age (y) Exposed Cases Controls 100 100 Odds Ratio 40 Yes 25 10 >40 50 20 No 25 10 Total 100 100 Total 50 20 b. Calculate the relationship of age and liver cancer (3) c. What is the relationship between age and alcohol, given the results below (3)