Direct standardization is preferred over indirect when:
A. Comparing more than two populations
B. Age-specific rates for the study population are unstable due to small numbers
C. Age-specific rates for the study population are reliable and available
D. Only total deaths are known
Answer: Option C
Solution (By JKSSB Mock Tests)
Direct standardization requires stable age-specific rates for the study group; if these are unreliable (e.g., small areas), indirect standardization (using standard rates) is more appropriate.
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