A cross-sectional study was conducted at Wah Medical College in the year 2006 to measure the period prevalence of smokers among 105 students. Out of them 5 were already smokers and 15 started during 2006, period prevalence of 2006 is:
belongs to book: COMMUNITY MEDICINE IMPORTANT MCQs| Muhammad Yousaf|| Chapter number:1| Question number:61
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b) 19%
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