Question

question 2
calculate the relative risk for the below table: and round to 2 decimal points.

	disease yes	disease no	totals
exposure no	26	40	66
	40	60	100

add your answer
integer, decimal, or e notation allowed

Explanation:

Step1: Define the formula for relative risk

Relative Risk (RR) = $\frac{a/(a + b)}{c/(c + d)}$, where $a$ is the number of exposed - diseased, $b$ is the number of exposed - non - diseased, $c$ is the number of non - exposed - diseased, and $d$ is the number of non - exposed - non - diseased. Here, $a = 14$, $b = 20$, $c = 26$, $d = 40$.

Step2: Calculate the numerator

The probability of disease in the exposed group is $\frac{a}{a + b}=\frac{14}{14 + 20}=\frac{14}{34}\approx0.4118$.

Step3: Calculate the denominator

The probability of disease in the non - exposed group is $\frac{c}{c + d}=\frac{26}{26+40}=\frac{26}{66}\approx0.3939$.

Step4: Calculate the relative risk

RR = $\frac{\frac{14}{34}}{\frac{26}{66}}=\frac{14\times66}{34\times26}=\frac{924}{884}\approx1.04$.

Answer:

1.04