A sample of n=100 participants was examined for a disease at baseline and annually for two follow-up visits. In this sample, n=20 participants had the disease at baseline and n= 15 new cases of disease are identified at the first follow-up visit and n=12 at the second follow-up visit. The baseline prevalence of disease is: Question 5 options: 47/100 20/100 20/80 27/100
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Step 1: Identify the number with disease at baseline = 20. Show more…
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Questions 1 through 5 refer to the following scenario: Over a 1-year period, a population of 4872 people experienced 211 new cases of a non-recurrent disease (D) called Alpha-Bravo, of whom 156 had the exposure (E) called factor XY. A total of 1683 people in the population were exposed to factor XY. 1. What measure(s) of disease frequency should you compute to estimate the amount of disease Alpha-Bravo occurring in this population? a. Incidence rate b. Incidence proportion (or cumulative incidence [risk]) c. Incidence rate and incidence proportion d. Point prevalence e. Don't know 2. Compute and interpret P(D). 3. Compute and interpret P(E). 4. Compute and interpret P(D|E). 5. Compute and interpret P(D|no E).
Adi S.
Consider the following 2 × 2 table from a hypothetical cohort study. Calculate the cumulative incidence of cardiovascular disease (CVD) among the not exposed participants. Serum fasting glucose Developed CVD Did not develop CVD Total ≥126 mg/dL (exposed) 125 325 450 <126 mg/dL (not exposed) 50 500 550 Total 175 825 1000 A. 9 per 100 population B. 44 per 100 population C. 28 per 100 population D. 72 per 100 population E. 50 per 175 population
Rashmi S.
Question 2 1. A study on diabetes begins with one thousand 40 to 45-year-old men of which 60 are already diabetic. The remaining 940 men are followed for 5 years during which time 75 men develop diabetes. Calculate the prevalence of diabetes at the start of the study. Please express the answer in a percentage to 2 decimal places without the % symbol. For example, for a prevalence of 0.025 or 2.5%, enter the number 2.50. No other text is required. 2. Consider a class with 80 enrolled students. None of the students were ill at the beginning of the school year. On August 30th, 10 students reported having a common cold. All continued to be ill on September 1st, but all 10 recovered within 3 days. On September 15th, 5 more students had a cold. All of these students continued to be ill on September 16th, but all recovered 5 days later. In this example, assume that a person cannot have a cold more than once: Calculate the prevalence of the common cold in the class on September 1st. Please express the answer in a percentage to 2 decimal places without the % symbol. For example, for a prevalence of 0.025 or 2.5%, enter the number 2.50. No other text is required.
Jon S.
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