Equal interval reduces which bias-
Correct Answer: Selection bias
Description: Bias may arise due to errors of assessment of the outcome due to the human element. 3 sources: subject variation, observer bias , bias in evaluation. Selection bias: cases and controls may not be representative of cases and controls in population. There may be a systemic difference in characteristics between cases and controls. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 81
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Social & Preventive Medicine
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