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.
Study Type
OBSERVATIONAL
Enrollment
1,500
DXA and CT-scan are usually performed during the following of these patients before bariatric surgery
Nancy university hosiptal
Vandœuvre-lès-Nancy, France
scanographic bone attenuation coefficient of the first lumbar vertebra SBAC-L1
on axial section of the first lumbar vertebra, with a region of interest
Time frame: November 2019-September 2020
Vertebral fracture
According Genant classification, on sagittal section of spine
Time frame: November 2019-September 2020
DXA: T-score
in standard deviation, on spine / hip / femoral neck / wrist
Time frame: November 2019-September 2020
DXA: Bone mineral density BMD (spine, hip , femoral neck, wrist)
in g/cm²
Time frame: November 2019-September 2020
DXA: lean and fat mass
in % and repartition of each
Time frame: November 2019-September 2020
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