Direct standardisation is used to compare moality data of two countries. This is done because of difference in: (A) Causes of deaths, (B) Numerators, (C) Denominators, (D) Age distribution
Answer is D. 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