PHC 6001 Chapter 2 Exam Questions with Correct Answers Latest Update 2025/2026
cumulative incidence - Answers Name the disease frequency:
The percentage of of freshman girls who become pregnant over the course of their high school
years.
prevalence - Answers Name the disease frequency:
The percentage of senior boys who are fathers at the time of graduation
incidence rate - Answers Name the disease frequency:
The number of live born babies who die of sudden infant death syndrome during the first year of
life per 100000 baby years of follow up
cumulative incidence - Answers Name the disease frequency:
The percentage of infants weighing less than 2500 grams at birth
a. prevalence b. incidence - Answers _____a_______ : quantifies existing cases
______b_______ : quantifies new cases
similarities of prevalence and incidence - Answers both quantify the number of new cases of
disease that develop in a population at risk during a specific period of time
differences between prevalence and incidence - Answers *incidence rate* is a true rate that
directly integrates person time of observation into the denominator; *cumulative incidence* is a
proportion whose denominator is the population at risk at the start of the observation period,
where time is expressed only by words that go along with the proportion.
dynamic population - Answers defined by a changeable state or condition, and therefore its
embership is transitory
fixed population - Answers defined by a life event and therefore its membership is permanent
0-1 or 0-100% - Answers range for cumulative incidence
0-1 or 0-100% - Answers range for prevalence
0-infinity - Answers range for incidence rate
cannot - Answers incidence rate must have both a numerator and a denominator to calculate;
therefore when the number of diseased is the only value you can/not calculate the incidence of
a disease.
d - Answers A study of 100 durg users who tested - HIV injection at enrollment and 3 month
cumulative incidence - Answers Name the disease frequency:
The percentage of of freshman girls who become pregnant over the course of their high school
years.
prevalence - Answers Name the disease frequency:
The percentage of senior boys who are fathers at the time of graduation
incidence rate - Answers Name the disease frequency:
The number of live born babies who die of sudden infant death syndrome during the first year of
life per 100000 baby years of follow up
cumulative incidence - Answers Name the disease frequency:
The percentage of infants weighing less than 2500 grams at birth
a. prevalence b. incidence - Answers _____a_______ : quantifies existing cases
______b_______ : quantifies new cases
similarities of prevalence and incidence - Answers both quantify the number of new cases of
disease that develop in a population at risk during a specific period of time
differences between prevalence and incidence - Answers *incidence rate* is a true rate that
directly integrates person time of observation into the denominator; *cumulative incidence* is a
proportion whose denominator is the population at risk at the start of the observation period,
where time is expressed only by words that go along with the proportion.
dynamic population - Answers defined by a changeable state or condition, and therefore its
embership is transitory
fixed population - Answers defined by a life event and therefore its membership is permanent
0-1 or 0-100% - Answers range for cumulative incidence
0-1 or 0-100% - Answers range for prevalence
0-infinity - Answers range for incidence rate
cannot - Answers incidence rate must have both a numerator and a denominator to calculate;
therefore when the number of diseased is the only value you can/not calculate the incidence of
a disease.
d - Answers A study of 100 durg users who tested - HIV injection at enrollment and 3 month
