You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The study of smoking as a cause of lung cancer, 90 cases were taken, 75 were smokers and among 100 controls 40 were smokers. Calculate the odds ratio ? and explain in detail?
Ans. is 'c' i.e., 7.5 Odds ratio is cross product of entries in the table. So, it is very impoant to make a correct table construct ? i) History of exposure (risk factor) is arranged on left column (row). ii) Disease is arranged on the top ? a) Cases in middle column (row) b) Controls in right column (row)