Bone Fragility Evaluation in Obese Patients

Bone Fragility Evaluation by Dual X-Ray Absorptiometry (DXA) and CT-scan (vertebral Fracture and Scanographic Bone Attenuation Coefficient of the First Lumbar Vertebra SBAC-L1) in Obese Patients

This research will study the bone fragility in obese patients, on DXA and CT-scan, in a transversal study. The investigators want also to study the specific risk factors of bone fragility in these obese patients (relationship between body composition on whole body on DXA, fat mass and its location, lean mass, weight loss after surgery and SBAC-L1), to improve the bone screening.

Inclusion Criteria:

• patients followed at Nancy university hospital for a bariatric surgery
• CT-scan and DXA performed before surgery, with maximum 1 year before the 2 exams

Exclusion Criteria:

• < 18 years
• Protected adults