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Card 12 / 17: Using the data in Table 2, calculate the number needed to treat with low?-dose aspirin to prevent 1 ischemic stroke.

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To better understand how the different part of the body works. To understand the physiology of the various structures in the body. To differentiate the systems of the human body .

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https://www.jobilize.com/randomized-controlled-trials-quiz-by-dr-janet-forrester-tufts

Randomized Controlled Trials (RCT), Relative Risk

Author:

Dr.Janet ForresterProfessor

Tufts University School of Medicine

USA

Access: Public Partially Instant Grading

Accepted Answer

Step 1) Calculate the absolute risk reduction: 221/19,942 . 170/19,934 = 0.0026 or 2.6 fewer cases per 1000 women treated with low?-dose aspirin Step 2)Take the reciprocal of the absolute risk reduction: 1/0.0026=392. Therefore, you would need to treat 392 women with low?-dose aspirin to prevent 1 ischemic stroke.

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