ORTHO
BULLETS
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Review Question - QID 4761

Statistic Definitions Type II Error (beta) Definition QID: 4761 (OBQ13.126)
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QID 4761 (Type "4761" in App Search)
A prospective, randomized controlled trial of 150 patients undergoing total hip arthroplasty is performed to test whether repair of the capsule during a posterior approach reduces post-operative dislocations in the first three months. The study found no difference in dislocation rate if the capsule was repaired versus not repaired (p = .34). Subsequently, a multicenter follow-up study of 2000 patients showed that repairing the capsule led to a decreased dislocation rate in the first three months (p = .03). Assuming the second study reflects reality, which of the following errors occurred in the first study?
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