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#1
09-03-2012
 USMLE Forums Scout Steps History: Step 1 Only Posts: 21 Threads: 3 Thanked 27 Times in 7 Posts Reputation: 37
Attributable Risk vs Attributable Risk Percent

I remember this term from the UW "attributable risk percent" and it was caculated as :
(RR-1)/RR

I'm confused between this and the Attributable Risk (Incidence-Incidence)..
what's the difference plz?

#2
09-03-2012
 USMLE Forums Scout Steps History: Not yet Posts: 13 Threads: 1 Thanked 3 Times in 2 Posts Reputation: 13
Ar/arp

attributable risk is just the difference
AR is the difference between the incidences.
Attributable risk percent = AR/Incidence of disease
or RR-1/RR
 The above post was thanked by: fadyhennawy (09-03-2012)
#3
09-03-2012
 USMLE Forums Scout Steps History: Step 1 Only Posts: 21 Threads: 3 Thanked 27 Times in 7 Posts Reputation: 37

Quote:
 Originally Posted by celendula attributable risk is just the difference AR is the difference between the incidences. Attributable risk percent = AR/Incidence of disease or RR-1/RR
I want to know the Definition (in words) of each of them, so I can distinguish them in the head of the question

Thanks anyhow!

#4
09-03-2012
 USMLE Forums Master Steps History: 1+CK+CS+3 Posts: 1,186 Threads: 119 Thanked 822 Times in 434 Posts Reputation: 832

Quote:
 Originally Posted by fadyhennawy I want to know the Definition (in words) of each of them,so I can distinguish them in the head of the question Thanks anyhow! Sent from my Desire using Tapatalk 2
attributable risk-------proportion of disease occurences that are attributable to the exposure(difference in risk b/w exposed and unexposed population)

attributable risk percentage------excess risk in a population can be explained by exposure to a particular risk factor...important measure of impact of risk factor

source----U world
 The above post was thanked by: fadyhennawy (09-03-2012)
#5
09-03-2012
 USMLE Forums Scout Steps History: Not yet Posts: 13 Threads: 1 Thanked 3 Times in 2 Posts Reputation: 13
hope this helps

okay here it is
Attributable risk is the measure of excess incidence of disease due to particular factor(exposure,,smoking in case of lung cancer)So it is difference between incidence of lung cancer in smoker(exposed) -incidence of L.C in nonsmoker
Attributable risk percent describes the contribution of a given exposure to the incidence of disease in "relative" terms.
It can be caluculated by either dividing AR by incidence of disease in exposed or RR-1/RR..
 The above post was thanked by: fadyhennawy (09-03-2012), Oscaryasser (10-24-2014)
#6
09-03-2012
 USMLE Forums Scout Steps History: Step 1 Only Posts: 21 Threads: 3 Thanked 27 Times in 7 Posts Reputation: 37

Got it
Thanks Venky & Celendula!

 Tags Biostatistics-Epidemiology

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