What is the main purpose of a T-score in bone densitometry?

• A. To measure the weight of a patient
• B. To compare a patient’s bone density to a healthy young adult
• C. To determine the patient's age
• D. To assess the need for medication

Answer: (B)

The primary purpose of a T-score in bone densitometry is to compare a patient’s bone density to that of a healthy young adult of the same sex. The T-score reflects how much a patient’s bone density deviates from the average peak bone mass, which is typically reached in early adulthood. This comparison is crucial for diagnosing osteoporosis and assessing fracture risk, as it provides a standard reference point against which individual results can be interpreted.

A lower T-score indicates lower bone density, which increases the risk of fractures, while a higher T-score suggests better bone health. This metric is an essential tool for healthcare providers when evaluating bone health and making decisions about patient management. Using this standardization helps in determining preventive or therapeutic strategies for individuals at risk of bone-related conditions.