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Social & Preventive Medicine Epidemiology d4173dc4

Bias is defind as?

A
Spurious association between two variables
B
A quantified relationship between exposure and disease
C
Systematic error in determination of association between exposure and disease
D
Statistical technique used to evaluate the effect of a treatment by comparing treated and non treated
High-Yield Explanation
Bias is any systemic error in the determination of the association between exposure and diseases. The relative risk estimate may increase or decrease as a result of the bias. It reflects some type of no compatibility between the study and control groups. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 81
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