While analysis of data, allocation into similar groups is done to ensure-: (A) Comparability, (B) Accuracy, (C) Validity, (D) Sensitivity
Answer is A. 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