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': 'Statistical method of calculate death rate among two population with different age groups \nSelect and explain. \nA. Crude death rate, B. Standardized death rate, C. Case fatality rate, D. Age specific death rate', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Standardized death rate Standardization (or adjustment) of rates is used to unable the valid comparison of groups that differ regarding an impoant health determinant (most commonly age). For example, if we want to compare the death rates of two different populations with different age composition, the crude death rate is not right yardstick because rates are only comparable if the populations upon which they are based are comparable. To remove this confounding effect of different age structure, adjustment or standardization is done. Two major approaches to standardization have been used :? Direct standardization Indirect standardization", 'role': 'assistant'}]