2013 International Society for Clinical Densitometry Position Development Conference: Task Force on Normative...

Area of Science:

• Clinical Densitometry
• Osteoporosis Research
• Medical Imaging Analysis

Background:

• Establishing standardized reference databases is crucial for accurate bone mineral density (BMD) interpretation.
• The International Society for Clinical Densitometry (ISCD) follows a rigorous protocol for developing official positions on densitometry standards.
• Previous variations in reference data utilization could impact BMD assessment consistency.

Purpose of the Study:

• To establish official positions on the use of normative databases for bone mineral density (BMD) assessment.
• To provide clear guidelines for calculating T-scores and Z-scores in clinical densitometry.
• To ensure consistency and accuracy in BMD interpretation across different manufacturers and populations.

Main Methods:

• The ISCD Expert Panel convened to review recommendations from the Task Force on Normative Databases.
• The RAND methodology was employed to achieve consensus among panel members.
• Agreement was sought on specific statements regarding the use of reference data for BMD calculations.

Main Results:

• Manufacturers should maintain their proprietary databases for lumbar spine T-score calculations.
• National Health and Nutrition Examination Survey III (NHANES III) data should remain the standard for femoral neck and total hip T-scores.
• Local reference data are permissible for Z-score calculation exclusively, not for T-scores.
• A single, non-race-adjusted Caucasian female database is recommended for calculating T-scores in men across all ethnic groups.

Conclusions:

• Standardized approaches to normative database utilization are essential for reliable BMD interpretation.
• These guidelines aim to enhance the clinical utility and comparability of bone density measurements.
• The recommendations promote a unified strategy for T-score and Z-score calculations in osteoporosis diagnosis.