This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
Direct standardisation is used to compare moality data of two countries. This is done because of difference in 
Select and explain. 
A. Causes of deaths, B. Numerators, C. Denominators, D. Age distribution
D: Age distribution
Answer: D: Age distribution 
Explanation: If we want to compare the death rates of two populations with different age-composition, the crude death rate is not the right yardstick This is because rates are only comparable if the populations upon which they are based ae comparable.It is cumbersome to use a series of age-specific death rates, hence &;age standardization&; is used to remove the confounding effect of different age groups.Park 23epg: 59