In a survey of 10,000 IV drug abusers in town A, 1,000 turn out to be infected with hepatitis C and 500 infected withhepatitis B. During two years of follow-up, 200 patients with hepatitis C infection and 100 patients with hepatitis Binfection die. Also during follow-up, 200 IV drug abusers acquire hepatitis C and 50 acquire hepatitis B. Which of thefollowing is the best estimate of the annual incidence of hepatitis C infection in IV drug abusers in town A?O A) 1,000/10,000O B) 1,100/10,000o C) 100/10,000O D) 100/9,000O E) 100/9,800

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Answered: In a survey of 10,000 IV drug abusers…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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4. Investigators are trying to determine if the contamination of a town well led to significant increases in adverse health effects. During the period of time when water was consumed from this contaminated well, there were 16 birth defects among 414 births. After this well was shut off, there were 3 birth defects among 228 births. You asked to determine if the rate of birth defects was higher when the contaminated well was in use. a. Clearly define what the exposure is and what the outcome is. b. Estimate the probability of a birth defect when the contaminated water was consumed. Estimate the probability of a birth defect when the contaminated well was shut off. Calculate the ratio of these two estimates; this is the Relative Risk of a birth defect with and without well water. c. Calculate the 95% confidence interval for the true population proportion of birth defects when the contaminated water was consumed. Calculate the 95% confidence interval for the true population proportion of…
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??
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