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
Between 2 countries moality compared best by- 
Select and explain. 
A. Age adjusted rates, B. Crude rates, C. Propotional rates, D. None
A: Age adjusted rates
Answer: A: Age adjusted rates 
Explanation: ref: Park&;s 23rd edition pg 58 Advantage of age adjusted standardised death rates is that it removes all the confounding effects of different age structures and yields a single standardised adjusted rate, by which the moality experience can be direclty compared.