CASE STUDIES IN BIOMETRY: Chapter 17.

Quality Control for Bone Mineral Density Scans

Suzanna Wong, Nancy Lane

The file ch17.dat contains the following 15 variables:

Variable   Description

OBS        Observation number
CN         Center obtaining and reading the scan
ID         Scan ID
BA1        Bone area (sq cm) from centralized Reader 1
BA2        Bone area (sq cm) from centralized Reader 2
BA3        Bone area (sq cm) from centralized Reader 3
BC1        Bone mineral content (gm) from centralized Reader 1
BC2        Bone mineral content (gm) from centralized Reader 2
BC3        Bone mineral content (gm) from centralized Reader 3
BMD1       Bone mineral density (gm/sq cm) from centralized Reader 1
BMD2       Bone mineral density (gm/sq cm) from centralized Reader 2
BMD3       Bone mineral density (gm/sq cm) from centralized Reader 3
BA         Bone area (sq cm) from participating center
BC         Bone mineral content (gm) from participating center
BMD        Bone mineral density (gm/sq cm) from participating center