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biostatistics - kallastro
#1
In a study on the use of antibiotic therapy to prevent the occurrence of febrile neutropenia during chemotherapy, 760 patients were randomly assigned to either oral levofloxacin (Levaquin) or to placebo beginning at the time that chemotherapy was initiated and continuing until the neutropenia resolved. Febrile neutropenia developed in 65% of patients who received levofloxacin and 85% of those who received placebo. Mortality rates and side effect profiles were similar in both groups. What is the number of patients needed to treat to prevent 1 episode of febrile neutropenia?
A. 50 patients
B. 20 patients
C. 10 patients
D. 5 patients
E. 2 patients
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#2
I think dddddd
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#3
A.
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#4
yes you are right.........

Number needed to treat = 1/(.85-.65)=5
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#5
thanks kallastro
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