While analysis of data, allocation into similar groups is done to ensure-
Correct Answer: Comparability
Description: In a case-control study, the controls may differ from cases in a number of factors like age, sex, occupation. - it is necessary to ensure comparability between cases and controls. - this process is called matching. Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:72
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Social & Preventive Medicine
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