Certified Professional in Healthcare Quality Examination: Advanced
Mastery in Quality Improvement, Patient Safety, Regulatory
Compliance, Risk Management, and High-Reliability Healthcare
Systems
Target Audience: Experienced healthcare quality professionals, CPHQ candidates
Difficulty: Mixed (60% Advanced / 40% Hard)
Domain 1: Quality Improvement – Data Analytics, Statistical Process Control, and Advanced Methods
(Questions 1–40)
1. A hospital's quality team is analyzing 24 months of CAUTI rates. The control chart shows 8 consecutive points below
the mean but within control limits. This indicates:
A) Special cause variation – a shift
B) Common cause variation only
C) The process mean has changed permanently
D) An error in data collection
Correct Answer: A
Rationale: Eight or more points on one side of the mean (shift) signals special cause variation per
Western Electric rules.
2. Which of the following is a requirement for constructing a valid p-chart for surgical site infections?
A) Constant sample size every month
B) Variable sample size with control limits calculated for each subgroup
C) Normally distributed data
D) At least 100 defects per month
Correct Answer: B
Rationale: p-charts accommodate variable subgroup sizes; control limits are recalculated per
subgroup using binomial distribution.
3. A QI team reports a project outcome with a pre-post design showing a 40% reduction in falls after implementing a
new protocol. The most significant threat to internal validity is:
A) Maturation
B) History (other concurrent changes)
C) Testing effect
D) Instrumentation
Correct Answer: B
Rationale: Without a control group, other simultaneous interventions (e.g., staffing changes) could
explain the reduction.
4. A hospital wants to compare the effectiveness of two different hand hygiene training methods across four units. The
most appropriate statistical test is:
A) Paired t-test
,B) Chi-square test of independence
C) ANOVA
D) Pearson correlation
Correct Answer: B
Rationale: Chi-square compares proportions (compliance rates) between two independent groups
(training methods).
5. In a Six Sigma project, the "Measure" phase includes all EXCEPT:
A) Validating the measurement system
B) Collecting baseline data
C) Implementing solutions
D) Developing an operational definition
Correct Answer: C
Rationale: Implement solutions occurs in the Improve phase; Measure focuses on baseline and
measurement system.
6. A run chart of weekly patient wait times shows an astronomical point (outlier) at week 12 due to an EHR downtime.
The team should:
A) Remove the point and ignore it
B) Investigate the special cause and document it, then proceed
C) Redraw the chart without the point
D) Discontinue the project
Correct Answer: B
Rationale: Astronomical point is special cause; investigate and annotate, but keep for transparency.
7. A hospital's QI department wants to predict future readmission rates based on historical data. The best forecasting
tool is:
A) Pareto chart
B) Time series analysis (e.g., moving average)
C) Fishbone diagram
D) Affinity diagram
Correct Answer: B
Rationale: Time series models detect patterns and forecast future values based on past data.
8. Which of the following is a key assumption of the "Model for Improvement"?
A) All improvement requires a randomized controlled trial
B) Every change is an improvement
C) Improvement requires testing changes through PDSA cycles
D) Measurement is optional
Correct Answer: C
Rationale: The Model for Improvement is based on iterative testing of changes.
9. A QI team uses a "control chart selection tree." For continuous data (e.g., door-to-balloon time) collected in
subgroups of 3–5 patients per day, the correct chart is:
A) Xbar-R chart
, B) p-chart
C) u-chart
D) XmR chart
Correct Answer: A
*Rationale: Xbar-R chart is for continuous data with subgroup sizes 2–9.*
10. A hospital's sepsis mortality improvement project fails to show statistically significant change. The team's next step
should be:
A) Abandon the project
B) Assess power, sample size, and clinical significance
C) Change the outcome measure
D) Publish as negative results only
Correct Answer: B
Rationale: Lack of statistical significance may be due to low power; clinical significance still matters.
11. Which of the following is an example of a "leading indicator" in quality improvement?
A) CLABSI rate
B) Percentage of staff completing hand hygiene simulation training
C) In-hospital mortality
D) 30-day readmission rate
Correct Answer: B
Rationale: Leading indicators predict future outcomes; training is a process measure that precedes
infection rates.
12. A QI team uses a "stratified sampling" method to audit medication reconciliation. This method:
A) Ensures random selection
B) Ensures representation from key subgroups (e.g., shifts, units)
C) Is always unbiased
D) Is the same as convenience sampling
Correct Answer: B
Rationale: Stratified sampling divides population into subgroups and samples proportionally.
13. A hospital's quality department is reviewing 10,000 medication orders for errors. The cost of auditing all orders is
prohibitive. The best approach is:
A) Audit all orders
B) Use statistical sampling with a defined confidence level and margin of error
C) Audit only high-risk drugs
D) Do not audit
Correct Answer: B
Rationale: Statistical sampling yields valid estimates with less resource use.
14. A control chart for monthly fall rates shows a "trend" of 6 consecutive points increasing. The probability of this
occurring by random chance alone is approximately:
A) 0.5%
B) 5%
C) 20%
Mastery in Quality Improvement, Patient Safety, Regulatory
Compliance, Risk Management, and High-Reliability Healthcare
Systems
Target Audience: Experienced healthcare quality professionals, CPHQ candidates
Difficulty: Mixed (60% Advanced / 40% Hard)
Domain 1: Quality Improvement – Data Analytics, Statistical Process Control, and Advanced Methods
(Questions 1–40)
1. A hospital's quality team is analyzing 24 months of CAUTI rates. The control chart shows 8 consecutive points below
the mean but within control limits. This indicates:
A) Special cause variation – a shift
B) Common cause variation only
C) The process mean has changed permanently
D) An error in data collection
Correct Answer: A
Rationale: Eight or more points on one side of the mean (shift) signals special cause variation per
Western Electric rules.
2. Which of the following is a requirement for constructing a valid p-chart for surgical site infections?
A) Constant sample size every month
B) Variable sample size with control limits calculated for each subgroup
C) Normally distributed data
D) At least 100 defects per month
Correct Answer: B
Rationale: p-charts accommodate variable subgroup sizes; control limits are recalculated per
subgroup using binomial distribution.
3. A QI team reports a project outcome with a pre-post design showing a 40% reduction in falls after implementing a
new protocol. The most significant threat to internal validity is:
A) Maturation
B) History (other concurrent changes)
C) Testing effect
D) Instrumentation
Correct Answer: B
Rationale: Without a control group, other simultaneous interventions (e.g., staffing changes) could
explain the reduction.
4. A hospital wants to compare the effectiveness of two different hand hygiene training methods across four units. The
most appropriate statistical test is:
A) Paired t-test
,B) Chi-square test of independence
C) ANOVA
D) Pearson correlation
Correct Answer: B
Rationale: Chi-square compares proportions (compliance rates) between two independent groups
(training methods).
5. In a Six Sigma project, the "Measure" phase includes all EXCEPT:
A) Validating the measurement system
B) Collecting baseline data
C) Implementing solutions
D) Developing an operational definition
Correct Answer: C
Rationale: Implement solutions occurs in the Improve phase; Measure focuses on baseline and
measurement system.
6. A run chart of weekly patient wait times shows an astronomical point (outlier) at week 12 due to an EHR downtime.
The team should:
A) Remove the point and ignore it
B) Investigate the special cause and document it, then proceed
C) Redraw the chart without the point
D) Discontinue the project
Correct Answer: B
Rationale: Astronomical point is special cause; investigate and annotate, but keep for transparency.
7. A hospital's QI department wants to predict future readmission rates based on historical data. The best forecasting
tool is:
A) Pareto chart
B) Time series analysis (e.g., moving average)
C) Fishbone diagram
D) Affinity diagram
Correct Answer: B
Rationale: Time series models detect patterns and forecast future values based on past data.
8. Which of the following is a key assumption of the "Model for Improvement"?
A) All improvement requires a randomized controlled trial
B) Every change is an improvement
C) Improvement requires testing changes through PDSA cycles
D) Measurement is optional
Correct Answer: C
Rationale: The Model for Improvement is based on iterative testing of changes.
9. A QI team uses a "control chart selection tree." For continuous data (e.g., door-to-balloon time) collected in
subgroups of 3–5 patients per day, the correct chart is:
A) Xbar-R chart
, B) p-chart
C) u-chart
D) XmR chart
Correct Answer: A
*Rationale: Xbar-R chart is for continuous data with subgroup sizes 2–9.*
10. A hospital's sepsis mortality improvement project fails to show statistically significant change. The team's next step
should be:
A) Abandon the project
B) Assess power, sample size, and clinical significance
C) Change the outcome measure
D) Publish as negative results only
Correct Answer: B
Rationale: Lack of statistical significance may be due to low power; clinical significance still matters.
11. Which of the following is an example of a "leading indicator" in quality improvement?
A) CLABSI rate
B) Percentage of staff completing hand hygiene simulation training
C) In-hospital mortality
D) 30-day readmission rate
Correct Answer: B
Rationale: Leading indicators predict future outcomes; training is a process measure that precedes
infection rates.
12. A QI team uses a "stratified sampling" method to audit medication reconciliation. This method:
A) Ensures random selection
B) Ensures representation from key subgroups (e.g., shifts, units)
C) Is always unbiased
D) Is the same as convenience sampling
Correct Answer: B
Rationale: Stratified sampling divides population into subgroups and samples proportionally.
13. A hospital's quality department is reviewing 10,000 medication orders for errors. The cost of auditing all orders is
prohibitive. The best approach is:
A) Audit all orders
B) Use statistical sampling with a defined confidence level and margin of error
C) Audit only high-risk drugs
D) Do not audit
Correct Answer: B
Rationale: Statistical sampling yields valid estimates with less resource use.
14. A control chart for monthly fall rates shows a "trend" of 6 consecutive points increasing. The probability of this
occurring by random chance alone is approximately:
A) 0.5%
B) 5%
C) 20%
