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': 'Which one of the following is not a special incidence rate \nSelect and explain. \nA. Attack rate, B. Secondary attack rate, C. Hospital admission rate, D. standardized moality rate', 'role': 'user'}, {'content': "Answer: D \nExplanation: ref: Park's 23rd edition pg 58 All except D are special incidence rate. Standardised moality rate is adjusted moality rate, which removes the confounding effect of different age structures and yields a single standardised or adjusted rate by which moality experience can be directly compared.", 'role': 'assistant'}]