This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Smoking is the cause of 85% of lung cancers that occurred within a group of smokers. This is an example of which of the following statistics? \nSelect and explain. \nA. Population attributable risk., B. Odds ratio, C. Attributable risk, D. Relative risk', 'role': 'user'}, {'content': "Answer: C \nExplanation: According to the question, 85% of the lung cancers that occur among smokers is due to their smoking. Thus there is a attributable risk of 85% for smokers to develop lung cancers. It implies that by controlling the factor, the disease can be eliminated. Attributable Risk is the difference in incidence rates of a disease between an exposed group and non-exposed group and it is often expressed as a percentage. Ref: Park's Textbook of Preventive and Social Medicine, 19th Edition; Pages 68 and 73.", 'role': 'assistant'}]