Question: A study reported in Meehan et al. (2013) was conducted to determine whether athletes had sustained previous undiagnosed concussions. A total of 731 patients met

A study reported in Meehan et al. (2013) was conducted to determine whether athletes had sustained previous undiagnosed concussions. A total of 731 patients met the inclusion criteria and were enrolled during the study period. Of these, 227 patients (31%) were unable to answer the questions that were used to determine if they had a previously undiagnosed concussion. An additional 18 were removed for incomplete or inaccurate data. Thus, 486 patients were included in the final analysis with a mean age of 15.5 years (with a standard deviation of 3.5 years). Most participants (63%) were male. The athletes playing a given sport at the time of the current injury were then classified according to the sport they participated in and whether or not they had a previously undiagnosed concussion.

a. Is the proportion of athletes having a previously unreported concussion related to the sport in which they participated?
b. What are the populations to which your conclusion in part (a) is applicable?

Sport of Current Injury Previous Unreported Concussion Yes No Fot ce Hocey Sr Basketball Lacosse 32 25 58 20 49 13 31 24

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