Data Analysis & Reporting Techniques Flashcards

A laboratory report includes an estimated glomerular filtration rate (eGFR) calculated from serum creatinine. Which variable most significantly introduces pre-analytical variability in this result?

Answer: Patient's dietary protein intake and hydration status prior to specimen collection

High protein intake and dehydration can significantly elevate serum creatinine, leading to underestimation of eGFR, making pre-analytical patient preparation critical.

Which graphical tool is most effective for identifying the root cause of a laboratory reporting error during a quality improvement investigation?

Answer: Fishbone (Ishikawa) diagram

A fishbone (Ishikawa) diagram systematically maps potential causes of a problem across categories such as people, process, equipment, and environment.

A CLC is reviewing lab utilization data and finds that a thyroid stimulating hormone (TSH) reflex algorithm is being bypassed frequently. What is the most impactful corrective strategy?

Answer: Analyze bypass reasons and implement LIS-enforced algorithm prompts to restore appropriate reflex testing

Identifying why the reflex algorithm is bypassed and enforcing it through the LIS with prompts ensures consistent, evidence-based cascade testing.

In laboratory statistics, what does the term 'analytical measurement range (AMR)' refer to?

Answer: The range of analyte concentrations that can be directly measured without dilution or concentration

The AMR is the interval of analyte concentrations over which a method can directly and accurately measure without specimen modification.

A laboratory consultant is designing a dashboard to report key performance indicators (KPIs) monthly. Which metric directly reflects test utilization appropriateness?

Answer: Ratio of duplicate or redundant test orders per physician/service

Tracking duplicate or redundant orders per ordering provider identifies inappropriate utilization patterns that increase costs without improving patient outcomes.

Which data transformation is typically applied to normalize a right-skewed laboratory dataset before performing parametric statistical analysis?

Answer: Square root or logarithmic transformation

Log or square root transformation compresses large values and spreads small values, converting right-skewed distributions into approximately normal distributions.

When a laboratory uses a reportable range (RR) and a patient's result exceeds it, what is the required action before issuing the result?

Answer: Dilute the specimen, repeat the test, and multiply by the dilution factor to report within the validated range

Specimens with results exceeding the reportable range must be diluted and retested; the final result is calculated by applying the dilution factor to bring the reading within the validated AMR.