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Chapter 46 Chapter Epidemiology and clinical studies Q&A (FPGEE) (1 OF 30) Sample Questions

1. In a perspective study comparing the effectiveness of two chemotherapeutic treatments for cervical cancer causes, were selected from one group of patients who had annual pap smears for at least five years prior to their initial diagnosis and from another groups of patients who had no history of prior pap smears screening. The selection cases from both groups in this study may result in distortion of a test measurement and systemic error. This is referred as?

A. Bias
B. Meta analysis
C. Systematic Review
D. Normal distribution

Answer

Ans: A

Tips: Types of Bias include
Interview bias—Because of blinding of interviewer’s response may be influenced, known as interview bias.
Recall Bias-Differentials in the memory capabilities.
Lead time bias---The selection of cases from both of these groups introduces a form of non-random error known as lead time bias
Confounding---effects because of dependent and independent variables.
Berksons bias (admission rate bias)—Distortion in risk ratios occur as result of different hospital admissions.

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