How many decimal places are used in a Z-score measurement?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (A)

In Bone Densitometry, a Z-score is typically reported using one decimal place. The Z-score is a statistical measure that compares an individual's bone density to the average bone density of a population that is the same age and gender. Reporting the Z-score with one decimal place allows for a clear understanding of how the individual's density compares to the population mean, while still providing sufficient precision for clinical decision-making.

Using one decimal place helps to convey the information succinctly, avoiding unnecessary clutter in the report while still providing actionable data. For clinical practice, it is essential to strike a balance between precision and simplicity, ensuring that healthcare providers can easily interpret the Z-score in the context of the patient's overall health and risk factors for osteoporosis or other bone health issues.