meenaxi
AIPPG Experienced Senior Member
Joined: 21 Feb 2009
Posts: 1637
74606 Credits
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 Posted: Tue Nov 03, 2009 1:26 pm Post subject: A study is done to determine if raloxifene will decrease the |
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A study is done to determine if raloxifene will decrease the incidence of vertebral fractures in postmenopausal women. The results are shown:
Raloxifene Placebo
Number of women in study group 2557 2576
Number of vertebral fractures 138 (5.4%) 260 (10.1%)
Based on these results, how many women 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/(10.1×5.4) = 2
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