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401076 - Introduction To Epidemiology Assignment

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University of Western Sydney

   

Introduction to Epidemiology (401076)

   

Added on  2020-02-24

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401076 - Introduction To Epidemiology Assignment, This assignment is based on the learning objectives and concepts in Topic 1. There are a total of 46marks and this assignment will contribute 20% towards the total assessment for this subject.

401076 - Introduction To Epidemiology Assignment

   

University of Western Sydney

   

Introduction to Epidemiology (401076)

   Added on 2020-02-24

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The University of Western SydneySchool of Science and HealthIntroduction to Epidemiology (401076)ASSIGNMENT 1 Spring, 2017Family name_First name_StudentID_Ass1
401076 - Introduction To Epidemiology Assignment_1
Q1. “In a health survey in a city neighbourhood 431 people aged 65 or above were examined, 52were found to have congestive heart failure. Each person was examined once, but the examinationwas staggered over a period of two years (given the sample was relatively big n=431)”a.“What was the prevalence of congenital heart failure?” [ Mark 2]Calculated using the formulae; Total number of cases/ total population52/431= 0.12Thus the prevalence of congenital heart failure is 0.12b. “Is it a point or period prevalence?” [ Mark 2]-This case represents pint prevalence as the population above 65 are are being examined for the condition.Q2. “This table presents the incidence rate IR (cumulative) and population size for two regions” “Which of the following statements are True (if Any) – explain your answer by calculation if needed” a.There were the same number of cases in both regions [mark 1]This statement is true , thus prevalence calculation will be arrived through;-Region A = 10/10000= 0.001-Region B = 5/5000= 0.001There is similarity of prevalence cases in both regionsb.There were twice as many cases in region A then region B [mark 1]False There is similarity of both cases in both regions, however there is disparity in population levels in the ratio of 1:2c.The risk of incurring the disease during the year was about the same for individual in region A as for those in region B [mark 1]The calculation for both regions is calculated through10/1000.1-While for region B is ;Region ARegion BPopulation size10,0005000IR of gastroenteritis 10 per 1005 per 100
401076 - Introduction To Epidemiology Assignment_2
5/1000.05From the above calculations there is higher risk of getting the diseases in region A than B.d.The risk of incurring the disease during the year was twice as high for individuals in region A as for those in region B. [mark 1]There is higher risks of getting in region A compared B, the ratio of regions A:B is 2:1, thus there is higher risks of getting disease.Q3 – “What will be the incidence rate of region A and Region B combined? [mark 4]The combined calculation of incidences rates will be calculated through the following formula;-15/15000-0.001-Thus there is 1 case per 1,000 peopleQ4. “In an army base, where there is a complete change of personnel every 3 months and the totalbase is always 1000 (i.e., every 3 months 1000 new soldiers arrive and 1000 leave). It was found that2000 soldiers incurred syphilis every year. What is the yearly cumulative incidence of syphilis in thisbase? “ [mark 2]The calculation will be calculated through proportions of people experiencing the outcome of thedisease-2000 cases/ (12 months/3 months intervalx1000)-2000/4000-½ (100%) = 50%-Thus cumulative incidence for the year is 50%Q5. “Now assume that in each three-monthly batch of 1000 soldier there were 250 soldiers whocontracted syphilis after exactly one month (let’s say on the payday) and another 250 who did soafter precisely two months”. a.Calculate the sum total of the soldiers’ period of exposure to risk (person-time) for use as denominator [mark 2]In the first three month batch of 250 soldiers 4 monthly episodes and 250 soldiers who are getting the disease after every 2 months which will give us 12months/2 monthsThe sum total of months experiencing exposure is 10 monthsb.Calculate the person-time incidence rate [mark 2]The calculation process for person time incidence rate is calculated throughFor the first batch is 250x (12/3) = 1000
401076 - Introduction To Epidemiology Assignment_3

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