Gce Model Questions Vol1 2023 Biology Question 42

Practice objective / multiple choice question 42 from the 2023 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2023 Biology Objective / Multiple Choice Hard Difficulty
Question 42 GCE_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • objective

A case‑control study of 2000 individuals investigates the association between smoking and disease X. Among 800 smokers, 120 develop the disease; among 1200 non‑smokers, 60 develop the disease.\n(a) Calculate the relative risk (RR).\n(b) Calculate the odds ratio (OR).\n(c) Determine the population attributable fraction (PAF) using the formula \(PAF = \frac{P_e(RR-1)}{P_e(RR-1)+1}\), where \(P_e\) is the proportion of the total population that are smokers.

Answer Options

Correct Answer A. Relative risk = 3.0; Odds ratio ≈ 3.35; PAF ≈ 44.4%
B. Relative risk = 2.5; Odds ratio ≈ 2.8; PAF ≈ 35.0%
C. Relative risk = 3.2; Odds ratio ≈ 3.6; PAF ≈ 48.0%
D. Relative risk = 2.9; Odds ratio ≈ 3.1; PAF ≈ 40.0%
Correct Answer
A
Correct Option:
Relative risk = 3.0; Odds ratio ≈ 3.35; PAF ≈ 44.4%

About This Question

This is Gce Model Questions Vol1 2023 Biology Question 42. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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