Waec Model Questions Vol1 2019 Biology Question 23
Practice objective / multiple choice question 23 from the 2019 Waec Model Questions Vol1 Biology examination.
A community health survey followed 2,000 individuals for five years. Among 500 smokers, 40 developed lung cancer. Among 1,500 non‑smokers, 30 developed lung cancer.\n(a) Calculate the incidence of lung cancer in smokers and in non‑smokers.\n(b) Determine the relative risk (RR) of lung cancer for smokers compared with non‑smokers.\n(c) If a smoking‑cessation programme reduces the number of smokers by 20% (the quitters adopt the non‑smoker risk), estimate how many cases of lung cancer would be prevented over the five‑year period.
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About This Question
This is Waec Model Questions Vol1 2019 Biology Question 23. It is a objective / multiple choice question from the 2019 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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