Z-score

これは何か

A Z-score compares BMD with people closer to the same age, and is preferred over T-score in younger adults and children.^[1,2]

なぜ重要か

It helps flag whether bone density is lower than expected for age, but it is not a diagnosis by itself.^[2,3]

どの判断に影響するか

• ISCD defines Z-score -2.0 or lower as below the expected range for age, and above -2.0 as within the expected range for age.^[2]
• In children and adolescents, osteoporosis should not be diagnosed from densitometry alone.^[3]

解釈上の注意

• Z-score needs population and growth context, especially in children, chronic disease, delayed puberty, or small body size.^[3]

関連疾患