Z-score is a standard measurement used in statistical analysis that looks at data with a normal distribution. It provides a standard unit of measurement for placing your data on a common scale. It ...

Dear Dr. Roach: The results for my last bone density test show not only a T-score but also a Z-score. For my spine (L1 through L4), the T-score is -3.4, while the Z-score is -1.4. Can you please ...