Study Examining the Effects of Training on PFPS in Collegiate Female Soccer
Players
Outcome
Exposure
Yes (+)
PFPS
No (-)
PFPS
Total
Intervention group
Exposed group
(McConnell Taping &
Exercise)
10
91
101
Control Group
Non-exposed group
(Exercise only)
35
66
101
Total
45
157
202
1. What is TOTAL population size?
202
2. What is the injury risk for the intervention group?
9%
3. Injury risk for the control group?
35%
4. Given the data in 2 x 2 - what is the relative risk (RR) for developing PFPS collegiate
female soccer players?
25.7%
5. Based on question 4, we could say, “The relative risk indicates the female collegiate
soccer players who participated in the intervention group (McConnell Taping &
Exercise) have a increased reduction in injury risk compared to those in the control
group.”
6. Calculate the ARR from the information (2 x 2 table) above.
26%
7. Based on the information in question 6, we could say, “The ARR indicates there is an
increased reduction in the number of PFPS injuries per 100 female collegiate soccer
players who receive intervention. 8. Calculate the RRR from the information (2 x 2 table) above.
0.743
9. The relative risk reduction (RRR) indicates the experimental group has a 71% less
chance of experiencing PFPS than the control group.
10.What is the variable assessed with the formula = probability of exposure with the
condition ÷ probability of exposure without the condition?
0.286
11.Calculate the odds ratio from the information (2 x 2 table) above.
0.286