usmlebuzz
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The attributable risk with exposure to an environmental toxin is 0.9. It is known that the disease risk in unexposed groups is 0.01. What is the relative risk?
A. 0.81
B. 9
C. 90
D. 91
E. 900
please reply in detail.
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| Ouli Maty
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Att risk= disease risk in exposed grp - disease risk in unexposed grp=0.9
Att risk=A-B=0.9=> A= 0.9-0.01=0.89
RR= disease risk in exposed grp / disease risk in unexposed grp
RR=0.89/0.01=89~90
Correct answer is C
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| Ouli Maty
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Sign error . +0.01 instead of -0.01
Att risk= disease risk in exposed grp - disease risk in unexposed grp=0.9
Att risk=A-B=0.9=> A= 0.9 + 0.01=0.91
RR= disease risk in exposed grp / disease risk in unexposed grp
RR=0.91/0.01=91
RR=91 definitely
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| EMI777LY
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Attributable risk =incidence rate w/exposure- (minus) - incidence rate w/out exposure
Relative risk = incidence rate w/exposure
w/out exposure
0.9=exposure (x) minus0.01
x=0.91
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Emily
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| EMI777LY
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exposure =0.9+0.01= 0.91
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Emily
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| Ouli Maty
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You still have to calculate the RR
which is equal to 0.91/0.01= 91
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| faisal
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the correct ans is D=91
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| usmlebuzz
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yes 91 is correct answer
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| EMI777LY
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THANK YOU MATT
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Emily
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