ISCD Exam | Study Guide & Practice Questions
Total body scan analysis - (answer)WHO T-score classification does not apply
cancellous bone (spongy bone) - (answer)Spine, ultradistal radius, calcaneus
Lost first in post menopausal women
cortical bone - (answer)compact bone — femoral neck, 1/3 radius, total body
Affected first by hyperparathyroisism, esp wrist
Measurement sites in kids - (answer)4-16 total body or body minus head
> 16 hip & spine
Mixed bone - (answer)Total hip, trochanter, phalanges
Osteoporosis - (answer)Fragility fracture (standing height or less)
Hip fracture
Vertebral, proximal humerus, or pelvis fx + osteopenia
Incidental vertebral fox
BMD </= -2.5
FRAX >/= 3 or 20
T-score - (answer)BMD patient - BMD young normal mean reference / SD young normal mean reference
Z-score - (answer)BMD patient - BMD age matched mean reference / SD age matched mean reference
Normal BMD child - (answer)Z-score > -2
T-score calculation database - (answer)Hip: NHANES female Caucasian
Spine: manufacturer female Caucasian
, ISCD Exam | Study Guide & Practice Questions
Race adjustment and osteoporosis - (answer)T-score NO
Z-score YES
Osteoporosis in kids - (answer)Low BMD AND fracture
Fractures: vertebral, single LEs, two UEs
Non DXA T-scores - (answer)QCT hip and femoral neck only allowed
How much bone strength is predicted by BMD? - (answer)60-80%
absolute risk - (answer)Number of people who develop a disease/number of people at risk
Relative Risk (RR) - (answer)Ratio of absolute risk in 2 groups
Ex. Absolute risk of fracture in smokers / absolute risk in nonsmokers = relative risk of fracture in
smokers
Risk of vertebral fracture for future vertebral fractures - (answer)20% 1-3 yrs
Risk of contralateral hip fracture after hip fx - (answer)29% in 5 yrs
5 year risk of fracture after any fx - (answer)Forearm: 15% males, 20% females
Vertebral: 18% males, 33% females
Risk factors for fracture independent of BMD - (answer)Low BMI
Prior fx
Family h/o hip fx
Current smoker
Total body scan analysis - (answer)WHO T-score classification does not apply
cancellous bone (spongy bone) - (answer)Spine, ultradistal radius, calcaneus
Lost first in post menopausal women
cortical bone - (answer)compact bone — femoral neck, 1/3 radius, total body
Affected first by hyperparathyroisism, esp wrist
Measurement sites in kids - (answer)4-16 total body or body minus head
> 16 hip & spine
Mixed bone - (answer)Total hip, trochanter, phalanges
Osteoporosis - (answer)Fragility fracture (standing height or less)
Hip fracture
Vertebral, proximal humerus, or pelvis fx + osteopenia
Incidental vertebral fox
BMD </= -2.5
FRAX >/= 3 or 20
T-score - (answer)BMD patient - BMD young normal mean reference / SD young normal mean reference
Z-score - (answer)BMD patient - BMD age matched mean reference / SD age matched mean reference
Normal BMD child - (answer)Z-score > -2
T-score calculation database - (answer)Hip: NHANES female Caucasian
Spine: manufacturer female Caucasian
, ISCD Exam | Study Guide & Practice Questions
Race adjustment and osteoporosis - (answer)T-score NO
Z-score YES
Osteoporosis in kids - (answer)Low BMD AND fracture
Fractures: vertebral, single LEs, two UEs
Non DXA T-scores - (answer)QCT hip and femoral neck only allowed
How much bone strength is predicted by BMD? - (answer)60-80%
absolute risk - (answer)Number of people who develop a disease/number of people at risk
Relative Risk (RR) - (answer)Ratio of absolute risk in 2 groups
Ex. Absolute risk of fracture in smokers / absolute risk in nonsmokers = relative risk of fracture in
smokers
Risk of vertebral fracture for future vertebral fractures - (answer)20% 1-3 yrs
Risk of contralateral hip fracture after hip fx - (answer)29% in 5 yrs
5 year risk of fracture after any fx - (answer)Forearm: 15% males, 20% females
Vertebral: 18% males, 33% females
Risk factors for fracture independent of BMD - (answer)Low BMI
Prior fx
Family h/o hip fx
Current smoker
