This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'The rate adjusted to allow for the age distribution of the populations \nSelect and explain. \nA. Perinatal moality rate, B. Crude moality rate, C. Feility rate, D. Age standardized moality rate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: ref: Park&;s 23rd edition pg 59 SMR (Standardised moality ratio): (usually expressed as percentage) of the total numkber of deaths that occur inthe study group to the number of deaths that would have been expected to occur if that study group had experienced death rates of a standard population (or reference poplulation).', 'role': 'assistant'}]