NBME Form 4 section 1 Q.17 - USMLE Forums
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#1
08-13-2012
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NBME Form 4 section 1 Q.17

A study is done to determine if raloxifene will decrese the vertebral fractures in postmenopausal woman.The results are shown:

Raloxifene Placebo
Number of women in study group 2557 2576
Number of vertebral fractures 138 260
(5.4%) (10.1%)
Based on these results.How many need to be treated to prevent one vertebral fracture?

A)100/5.4=18.5
B)100/10.1=10
C)100/(10.1+5.4)=6.5
D)100/(10.1-5.4)=21
E)100/(10.1x5.4)=2

#2
08-13-2012
 USMLE Forums Scout Steps History: Not yet Posts: 12 Threads: 3 Thanked 0 Times in 0 Posts Reputation: 10

A study is done to determine if raloxifene will decrese the vertebral fractures in postmenopausal woman.The results are shown:

Number of women in study group 2557 (Raloxifene)......2576(Placebo)
Number of vertebral fractures 138 (Raloxifene)[5.4%]...260(Placebo)[10.1%]
Based on these results.How many need to be treated to prevent one vertebral fracture?

A)100/5.4=18.5
B)100/10.1=10
C)100/(10.1+5.4)=6.5
D)100/(10.1-5.4)=21
E)100/(10.1x5.4)=2

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