Abstract
Background
Bariatric surgery (BS) can lead to bone loss and an increased fracture risk.
Methods
To determine the morphometric vertebral fracture (MVF) prevalence, and its relationship with bone mineral density (BMD), and biomarker’s turnover after Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG), we analyzed post-surgery X-rays of the spine in 80 patients (88% female, 51% RYGB, age 41.2 [6.8] years) from 117 participants’ retrospective cohort (1–2 years, >2 and <5 years, and >5 years). We still analyzed body composition and BMD by dual-energy X-ray absorptiometry and bone parameters.
Results
MVF prevalence was 17.5% (14/80), with no statistical difference between groups (p = 0.210). RYGB group had a higher prevalence of secondary hyperparathyroidism (SHPT) (PTH ≥ 65 pg/ml; 18.4% vs 7.8%, respectively, p = 0.04), PTH (61.3 vs 49.5 pg/ml, p = 0.001), CTX (0.766 [0.29] ng/ml vs 0.453 [0.30] ng/ml, p = 0.037), and AP (101.3 [62.4] U/L vs 123.9 [60.9] U/L, p = 0.027) than the SG group. Up to 5 years postoperatively, RYGB had a lower total (1.200 [0.087] vs 1.236 [0.100] g/cm2, p = 0.02), femoral neck (1.034 [0.110] vs 1.267 [0.105], p = 0.005), and total femur BMD (1.256 [0.155] vs 1.323 [0.167], p = 0.002) than SG group. We found no statistically significant difference between the MFV (+) and MVF (−) groups regarding age, sex, BMI, surgery time, BMD, or bone and metabolic parameters, including leptin.
Conclusion
We found a high prevalence of MVF after BS with no differences between RYGB and SG.
Graphical Abstract
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Funding
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior–Brasil (CAPES) [Finance Code 001].
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Key points
• There was a high prevalence of MVF after BS (17.5%), with no differences between RYGB and SG.
• High serum CTX concentrations were independently associated with MVF.
• After 5 years, RYGB group had lower BMD and higher serum PTH than SG group.
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de Holanda, N.C.P., Silva, T.I.A.R., Cavalcante, A.G. et al. Prevalence of Morphometric Vertebral Fractures After Bariatric Surgery and Its Relationship with Bone Mineral Density and Bone Markers. OBES SURG 34, 733–740 (2024). https://doi.org/10.1007/s11695-023-07049-5
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DOI: https://doi.org/10.1007/s11695-023-07049-5