CPH (Certified in Public Health) Exam -
(Latest 2026/2027 Update) Questions and
Verified Answers | 100% Correct | Grade A
This Certified in Public Health (CPH) Practice Exam is an online tool
developed by the NBPHE containing Mega 500 retired exam
items(Q&A), designed to simulate the actual 200-question, four-hour
exam. It helps candidates evaluate their competency across 10 core
domains, offering performance analytics to identify strengths and
weaknesses to guide study plans.
Key Aspects of the CPH Practice Exam:
Content Validity: The practice questions are retired items from past
exams, ensuring they reflect the current exam blueprint and difficulty
level.
Structure: Like the actual exam, it uses multiple-choice questions
focusing on the 5 core areas (biostatistics, epidemiology, health
administration, environmental health, behavioral sciences) and 7 cross-
cutting areas.
Feedback: Provides a detailed breakdown of performance in each of
the 10 domains, allowing for targeted studying of areas needing
improvement.
Format: Available online, allowing candidates to test their pacing and
familiarity with the interface.
Purpose: It is designed to be taken once or twice to identify knowledge
gaps, rather than to be memorized.
,Attributable risk -
Answer
Rate of disease in exposed individuals that can be attributed to the exposure. Or
the proportion of all cases that can be attributed to a particular exposure.
Quiz_________________?
Adjusted rate -
Answer
Effects of differences in composition of pops being compared have been
minimized by statistical methods.
ex: regression analysis and strandardization
-often used on rates or relative risks
Quiz_________________?
Ecological Fallacy -
Answer
Bias that may occur because an association observed between variables or an
aggregate level does not represent the association that exists at an individual level
Quiz_________________?
Confidence Interval -
Answer
95% confident that the true value of a variable is contained within the interval.
,-used to account for sampling variability
-it is a point estimate +_ margin of error, where the point estimate is the best
estimate of teh unknown parameter and the margin of error is the product of the
confidence level and the standard error.
if a 95% CI for the differences in mean does not include 0 (the null value) then
there is eveidence of a statistically significant difference at sigma=0.05
Quiz_________________?
Clinical Trial Phases -
Answer
1. Safety and Pharmacologic profiles
2. pilot efficacy studies
3. extensive clinical trials
4. after the FDA approves, look at specific effects to establish incidence of
adverse reactions, etc. longterm use effects.
Quiz_________________?
interpretation of studies -
Answer
temporality: cause precedes effect
Specificity: important in assessing the possibility of biases.
Consistency: several studies showing similar results. homogeneity statistically.
, Quiz_________________?
Confounders -
Answer
-non-causal association between exposure and outcome as a result of a third
variable.
-distortion of effect by other factors
-must be related to exposure AND outcome
-not an intermediate variable on causal pathway
Quiz_________________?
Controlling for confounders -
Answer
before data collection: random collection, individual matching, frequency matching
After data collection: direct adjustment, indirect adjustment, mantel-haenszel,
regression techniques
Quiz_________________?
Quality Assurance vs. Quality Control -
Answer
QA: ensure quality before data collection
QC: monitor and maintain quality during study
(Latest 2026/2027 Update) Questions and
Verified Answers | 100% Correct | Grade A
This Certified in Public Health (CPH) Practice Exam is an online tool
developed by the NBPHE containing Mega 500 retired exam
items(Q&A), designed to simulate the actual 200-question, four-hour
exam. It helps candidates evaluate their competency across 10 core
domains, offering performance analytics to identify strengths and
weaknesses to guide study plans.
Key Aspects of the CPH Practice Exam:
Content Validity: The practice questions are retired items from past
exams, ensuring they reflect the current exam blueprint and difficulty
level.
Structure: Like the actual exam, it uses multiple-choice questions
focusing on the 5 core areas (biostatistics, epidemiology, health
administration, environmental health, behavioral sciences) and 7 cross-
cutting areas.
Feedback: Provides a detailed breakdown of performance in each of
the 10 domains, allowing for targeted studying of areas needing
improvement.
Format: Available online, allowing candidates to test their pacing and
familiarity with the interface.
Purpose: It is designed to be taken once or twice to identify knowledge
gaps, rather than to be memorized.
,Attributable risk -
Answer
Rate of disease in exposed individuals that can be attributed to the exposure. Or
the proportion of all cases that can be attributed to a particular exposure.
Quiz_________________?
Adjusted rate -
Answer
Effects of differences in composition of pops being compared have been
minimized by statistical methods.
ex: regression analysis and strandardization
-often used on rates or relative risks
Quiz_________________?
Ecological Fallacy -
Answer
Bias that may occur because an association observed between variables or an
aggregate level does not represent the association that exists at an individual level
Quiz_________________?
Confidence Interval -
Answer
95% confident that the true value of a variable is contained within the interval.
,-used to account for sampling variability
-it is a point estimate +_ margin of error, where the point estimate is the best
estimate of teh unknown parameter and the margin of error is the product of the
confidence level and the standard error.
if a 95% CI for the differences in mean does not include 0 (the null value) then
there is eveidence of a statistically significant difference at sigma=0.05
Quiz_________________?
Clinical Trial Phases -
Answer
1. Safety and Pharmacologic profiles
2. pilot efficacy studies
3. extensive clinical trials
4. after the FDA approves, look at specific effects to establish incidence of
adverse reactions, etc. longterm use effects.
Quiz_________________?
interpretation of studies -
Answer
temporality: cause precedes effect
Specificity: important in assessing the possibility of biases.
Consistency: several studies showing similar results. homogeneity statistically.
, Quiz_________________?
Confounders -
Answer
-non-causal association between exposure and outcome as a result of a third
variable.
-distortion of effect by other factors
-must be related to exposure AND outcome
-not an intermediate variable on causal pathway
Quiz_________________?
Controlling for confounders -
Answer
before data collection: random collection, individual matching, frequency matching
After data collection: direct adjustment, indirect adjustment, mantel-haenszel,
regression techniques
Quiz_________________?
Quality Assurance vs. Quality Control -
Answer
QA: ensure quality before data collection
QC: monitor and maintain quality during study
