Study Material for Introduction to Epidemiology

ID
The University of Western Sydney
School of Science and Health
Introduction to Epidemiology (401076)
ASSIGNMENT 1
Autumn, 2019
Due date: 7/04/2019 midnight
This assignment is based on the learning objectives and concepts in in weeks 1to 3
(not including measures of association). There are a total of 60marks and this
assignment will contribute 20% towards the total assessment for this subject.
Your assignment should be typed, with adequate space left between questions.
Assignments should be submitted via vUWS (see specific instructions relating to
Assignment 1 on vUWS).
Be as brief as possible in your answers, and use the number of marks for a question as
a guide to how much to write.
No answers need to be longer than a few short sentences or short paragraphs. No need
for referencing
Late assignments will not be accepted without prior approval. Any request needs
supporting documents.
Remember to save your assignment to make sure it is the final version and
submit only this. as:
Family name_First name_StudentID_Ass1_final
After due date I will not be able to remove the assignment. It is controlled by
Turnitin!!So the only version that will be corrected is the last one you submitted
before due date

ID
Question 1(14)
A rural community in Queensland was estimated to have a population of 73,000
during a census conducted on January 1st 2016. Of these, 3600 people were known to
have been diagnosed with type 2 diabetes before this day. During 2016, the entire
community was followed and 230 new cases of type 2 diabetes were diagnosed.
(a) “What was the prevalence of type II diabetes in this community on January 1st
2016?”[2 Marks]
3600
(b) “What was the prevalence of type II diabetes in this community on 30th of
December 2016?” [2 marks]
3600+230 =3830
(c) “What was the cumulative incidence of type II diabetes in this community
during 2016?” [4 Marks]
Cumulative incidence of type II diabetes 3830
“If during 2016 5,000 people from the entire community died and left the study area.
Assume that these 5000 people and the 230 new cases of diabetes were healthy at
least half of the year”.
(d) What type of incidence you need to calculate [2 Marks]
This is the total number of people affected with type II diabetes
(e) Calculate this type of incidence [4Marks]
Define the population at risk during this time = 73000- 5000 (5000 died)
Define the population at risk during this time =68000
Random sample from that population= 5230
Incidence = New ∧ pre existed casesoccuring during a given period of time
Population at risk at that same time

ID
Incidence = 3600+2300
68000
Incidence = 5900
68000
Incidence = 0.086764
Question 2:
“Data from HealthStats NSW (2015) are provided below. Use these data to answer
the following questions”.
Number of people with type 2 diabetes 756,507
Deaths from type 2 diabetes related causes 5,025
Death from all causes in NSW 49,607
Total population of NSW 9,006,043
a) Calculate all-cause mortality rate? [2 Marks]
All-cause mortality rate is obtained using the following formula,
All-cause mortality rate= all cause deaths
Total population × 100
All-cause mortality rate= 49,607
9,006,043 × 100
All-cause mortality = 0.5508%
(b) Calculate diabetes-specific mortality rate [2 Marks]
Diabetes-specific mortality rate =
Deaths ¿ type 2 diabetes related causes ¿
Number of people withtype 2 diabetes × 100
Diabetes-specific mortality rate = 5,025
756,507 × 100
Diabetes-specific mortality rate = 0.664%

ID
(c) Calculate diabetes case fatality rate?[2 Marks]
Diabetes case fatality rate=
Number of death due ¿ diabetes disease ¿
Number of cases of diabetes diseas ×
100
Diabetes case fatality rate= 5,025
5,025+ 756,507 × 100
Diabetes case fatality rate= 5,025
761532 × 100
Diabetes case fatality rate= 0.6598%
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