Hello, I am having difficulty with these questions. Please provide answers to all parts and show...

Hello, I am having difficulty with these questions. Please provide answers to all parts and show some work so I can learn. Thank you so much in advance! :)

Suppose that you began a one-year study of tuberculosis (TB) in a subsidized housing community in the Lower East Side of New York City on January 1^st, 2016. You enrolled 500 residents in your study and checked on their TB status on a monthly basis. At the start of your study on January 1^st, you screened all 500 residents. Upon screening, you found that 20 of the healthy residents were immigrants who were vaccinated for TB and so were not at risk. Another 30 residents already had existing cases of TB on January 1^st. On February 1^st, five residents developed TB. On April 1^st, five more residents developed TB. On June 1^st, 10 healthy residents moved away from New York City were lost to follow-up. On July 1st, 10 of the residents who had existing TB on January 1^st died from their disease. The study ended on December 31, 2016. Assume that once a person gets TB, they have it for the duration of the study, and assume that all remaining residents stayed healthy and were not lost to follow-up.

Is the subsidized housing community in the Lower East Side of New York City a dynamic or fixed population? Briefly explain the rationale for your answer.

a) What was the prevalence of TB in the screened community on January 1^st? Format: (x) / (y) = (z), where X is the numerator for prevalence, Y is the denominator for prevalence and Z is the prevalence %

b) What was the cumulative incidence of TB over the year? Format: (x) / (y) =(z) where X is the numerator for incidence, Y is the denominator for incidence, and Z is the incidence as a %

c) Suppose that you wanted to calculate the incidence rate of TB in the study population. Calculate the amount of person-time that would go in the denominator of this incidence rate. Be sure to show your work.

d) What was the case-fatality rate among residents with TB over the course of the year? Format: (x) / (y) = (z) where X is the numerator for case-fatality, Y is the denominator for case-fatality, and Z is the case-fatality as a %.

Expert Solution

Ans: i would say the population was static because we enrolled 500 of them and our observation was based on these 500 people. No other people was added in the experiment.

Colby Messinger answered 7 months ago

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