Osteoporosis is defined as a T-score of:

Osteoporosis is defined as a T-score of:

• A. -1.0 to -2.0
• B. -2.0 to -2.5
• C. -0.5 to -2.0
• D. -2.5 and less

Answer: (D)

T-score thresholds classify bone mineral density into normal, osteopenia, and osteoporosis. The T-score shows how many standard deviations the patient’s BMD is from the young healthy adult mean. Osteoporosis is defined as a T-score that is -2.5 or lower, meaning the BMD is at least 2.5 standard deviations below the young adult reference. Values between -1.0 and -2.5 indicate osteopenia, and a T-score above -1.0 is considered normal. (In some cases, a fragility fracture confirms osteoporosis even if the T-score isn’t below -2.5.)

T-score thresholds classify bone mineral density into normal, osteopenia, and osteoporosis. The T-score shows how many standard deviations the patient’s BMD is from the young healthy adult mean. Osteoporosis is defined as a T-score that is -2.5 or lower, meaning the BMD is at least 2.5 standard deviations below the young adult reference. Values between -1.0 and -2.5 indicate osteopenia, and a T-score above -1.0 is considered normal. (In some cases, a fragility fracture confirms osteoporosis even if the T-score isn’t below -2.5.)