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Exercise 6 (cohort study) The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion risk for kids playing hockey. 1. This study may be seen as a cohort study. Explain. 2. What was the exposure in this study? Who were the non exposed subjects? 3. Define natural experiment. In what way could this study be described as a natural experiment? 4. On the basis of data provided in the article, estimate the relative risk of severe concussion. 5. Estimate the attributable risk for all concussions. 6. Define personyears. Do you think that the authors used personyears in this study? Would you have used personyears? 7. The article indicates that hockey injuries account for 10 per cent of all youth sports injuries. In that statement, what is the exposure group? Who are the unexposed subjects? What is the name of the parameter that the 10 per cent represents? You should devote approximately 57 hours to this assignment. Assignments received after September 22nd will receive a maximum mark of 50%. Version 1 September 2010

Exercise 6A cohort study - McGill University 2010/Exercis… · Exercise 6 (cohort study) The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion

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Page 1: Exercise 6A cohort study - McGill University 2010/Exercis… · Exercise 6 (cohort study) The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion

Exercise 6 (cohort study) 

 

The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion risk for kids playing hockey. 

 

1. This study may be seen as a cohort study. Explain. 

2. What was the exposure in this study? Who were the non exposed subjects? 

3. Define natural experiment. In what way could this study be described as a natural experiment? 

4. On the basis of data provided in the article, estimate the relative risk of severe concussion. 

5. Estimate the attributable risk for all concussions. 

6. Define person‐years. Do you think that the authors used person‐years in this study? Would you have used person‐years? 

7. The article indicates that hockey injuries account for 10 per cent of all youth sports injuries. In that statement, what is the exposure group? Who are the unexposed subjects? What is the name of the parameter that the 10 per cent represents? 

 

You should devote approximately 5‐7 hours to this assignment. Assignments received after September 22nd will receive a maximum mark of 50%. 

 

Version 1 September 2010 

Page 2: Exercise 6A cohort study - McGill University 2010/Exercis… · Exercise 6 (cohort study) The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion
Page 3: Exercise 6A cohort study - McGill University 2010/Exercis… · Exercise 6 (cohort study) The accompanying article from The Globe and Mail (9 June 2010) describes a study of concussion
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Text Box
Morrow, A. (2010, June 9th). Legal hits quadruple concussion risk for kids for hockey. The Globe and Mail, A1 -A9.