Respuesta :
Answer:
The incidence rate of prostate cancer in this population, expressed in terms of 1000 person-years is 7.469
Step-by-step explanation:
Consider the provided information.
It is given that 38 prostate cancer cases were confirmed at the end of year 1 and the total population was 4,185.
As we need to find the incidence rate of prostate cancer in this population, expressed in terms of 1000 person-years, thus 4185/1000 = 4.185
Thus, the incident rate is: Number of new case/ population of study in 1000.
[tex]\frac{38}{4.185}=9.080[/tex]
17 additional cases were confirmed and 5 men had withdrawn from the study at the end of year 2. That means total population is 4185-5=4180
Thus, the incident rate is:
[tex]\frac{17}{4.180}=4.067[/tex]
52 additional cases were confirmed at the end of year 3.
Thus, the incident rate is:
[tex]\frac{52}{4.180}=12.44[/tex]
19 additional cases were confirmed and 10 men had withdrawn from the study at the end of year 4.
Thus, the incident rate is:
[tex]\frac{19}{4.170}=4.556[/tex]
30 additional cases were confirmed and 5 men had withdrawn from the study at the end of year 5.
Thus, the incident rate is:
[tex]\frac{30}{4.165}=7.203[/tex]
The average expressed in terms of 1000 person-years
[tex]\frac{9.080+4.067+12.44+4.556+.203}{5}=\frac{37.346}{5}=7.469[/tex]
Hence, the incidence rate of prostate cancer in this population, expressed in terms of 1000 person-years is 7.469
