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  • Title: Changes in bone mineral density following laparoscopic sleeve gastrectomy: 2-year outcomes.
    Author: Ben-Porat T, Peretz S, Rottenstreich A, Weiss R, Szalat A, Elazary R, Abu Gazala M.
    Journal: Surg Obes Relat Dis; 2022 Mar; 18(3):335-342. PubMed ID: 35058132.
    Abstract:
    BACKGROUND: Emerging evidence suggests that sleeve gastrectomy (SG) leads to significant bone mineral density (BMD) losses, but there is a paucity of studies evaluating skeletal consequences beyond 12-months post-operatively. OBJECTIVES: To evaluate BMD changes 2 years postoperatively. SETTING: A university hospital. METHODS: Thirty-three women (mean age: 34.4 ± 12.3 years) who underwent SG and completed 24 months of follow-up were evaluated prospectively at baseline and at 3 (M3), 6 (M6), 12 (M12), and 24 (M24) months postoperatively. Data collected included BMD at the total hip, femoral neck, and lumbar spine measured by dual-energy x-ray absorptiometry and anthropometrics, biochemical, nutritional, and physical activity parameters. RESULTS: At M24, patients achieved a mean body mass index and excess weight loss of 32.4 ± 5.1 kg/m2 and 64.5 ± 21.4%, respectively; however, weight stabilized at M12. Femoral neck BMD decreased significantly from baseline to M24 (.924 ± .124 versus .870 ± .129 g/cm2, P < .001), with no change between M12 and M24 (P = .273). Total hip BMD decreased significantly from baseline to M24 (1.004 ± .105 versus .965 ± .132 g/cm2, P < .001) but increased between M12 and M24 (P = .001). No significant changes were noted in lumbar spine BMD. The percentage of changes in the femoral neck and the total hip BMD from baseline to M24 positively correlated with postoperative excess weight loss (r = .352, P = .045, and r = .416, P = .018, respectively). CONCLUSION: Despite notable weight loss, women who underwent SG experienced significant bone loss at the total hip and femoral neck more than 2 years postoperatively. Future studies should investigate intervention strategies to attenuate skeletal deterioration after SG.
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