# 92296: Fundamentals of Epidemiology - Stratum-Specific Risk Ratios - Epidemiology Assignment Help

• Internal Code :

6EAEB

• Subject Code :

92296

• University :

University of Technology Sydney

• Country :

Australia

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Question 1

A cohort study of people who were admitted to hospital for a stroke looked at the association between admission to hospital on weekdays (Monday to Friday) or the weekend (Saturday and Sunday) with in-hospital mortality. The data from the study are reported in Table 1 below. In this question, provide all working for your calculations.

1. Calculate the risk ratio for in-hospital mortality to compare mortality by admission period.

3. Now calculate the attributable fraction associated with a weekend admission. Give an interpretation of your answer.

5. Now calculate and interpret the population attributable fraction for weekend admissions.

6. Summarise the findings from 1 to 5 in a paragraph.

7. What further information would you wish to know to assess the validity of your conclusions?

Table 2: In-hospital mortality, by admission period (weekday or weekend), among people  admitted to hospital for a stroke

(a) Age < 65 years

1. Calculate the stratum-specific risk ratios.

2. Using 1, discuss whether the age-group is an effect modifier.

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• Posted on : May 23rd, 2019

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