Abstract
Background and Aims
Longitudinal assessment of body composition following bariatric surgery allows monitoring of health status. Our aim was to elucidate trends of anthropometric and clinical outcomes 3 years following sleeve gastrectomy (SG).
Methods
A prospective cohort study of 60 patients who underwent SG. Anthropometrics including body composition analysis measured by multi-frequency bioelectrical impedance analysis, blood tests, liver fat content measured by abdominal ultrasound and habitual physical activity were evaluated at baseline and at 6 (M6), 12 (M12), and 36 (M36) months post-surgery.
Results
Sixty patients (55% women, age 44.7 ± 8.7 years) who completed the entire follow-up were included. Fat mass (FM) was reduced significantly 1 year post-surgery (55.8 ± 11.3 to 26.7 ± 8.3 kg; P < 0.001) and then increased between 1 and 3 years post-operatively, but remained below baseline level (26.7 ± 8.3 to 33.1 ± 11.1 kg; P < 0.001). Fat free mass (FFM) decreased significantly during the first 6 months (64.7 ± 14.3 to 56.9 ± 11.8 kg; P < 0.001), slightly decreased between M6 and M12 and then reached a plateau through M36. Weight loss “failure” (< 50% excess weight loss) was noticed in 5.0% and 28.3% of patients at M12 and M36, respectively. Markers of lipid and glucose metabolism changed thereafter in parallel to the changes observed in FM, with the exception of HDL-C, which increased continuingly from M6 throughout the whole period analyzed (45.0 ± 10.2 to 59.5 ± 15.4 mg/dl; P < 0.001) and HbA1c which continued to decrease between M12 and M36 (5.5 ± 0.4 to 5.3 ± 0.4%; P < 0.001). There were marked within-person variations in trends of anthropometric and clinical parameters during the 3-year follow-up.
Conclusions
Weight regain primarily attributed to FM with no further decrease in FFM occurs between 1 and 3 years post-SG. FM increase at mid-term may underlie the recurrence of metabolic risk factors and can govern clinical interventions.
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Abbreviations
- BIA:
-
Bioelectrical impedance analysis
- BMI:
-
Body mass index
- CRP:
-
C-reactive protein
- DEXA:
-
Dual X-ray absorptiometry
- EWL:
-
Excess weight loss
- FFM:
-
Fat free mass
- FM:
-
Fat mass
- HbA1C:
-
Hemoglobin A1c
- HRI:
-
Hepato-renal index
- HDL-C:
-
High-density lipoprotein cholesterol
- HOMA:
-
Homeostasis model assessment
- IBW:
-
Ideal body weight
- IR:
-
Insulin resistance
- LDL-C:
-
Low-density lipoprotein cholesterol
- NAFLD:
-
Nonalcoholic fatty liver disease
- RCT:
-
Randomized clinical trial
- RYGB:
-
Roux-en-Y gastric bypass
- RMR:
-
Resting metabolic rate
- SG:
-
Sleeve gastrectomy
- TC:
-
Total cholesterol
- WC:
-
Waist circumference
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Funding
This study was supported (in part) by grant no. 3-10470 from the Chief Scientist Office of the Ministry of Health, Israel. The funding source did not have a role in the design, conduct, and analysis of the study or the decision to submit the manuscript for publication.
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The authors’ responsibilities were as follows—SSD, OS, SZS, NS, DG, AR, and AD designed the research; SSD, AB, NB, and MW performed the research; SSD and SZS analyzed the data; SSD, SZS, and OS wrote the manuscript. All authors critically revised the manuscript, agree to be fully accountable for ensuring the integrity and accuracy of the work, and read and approved the final manuscript.
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All procedures performed in this study were approved by the institutional review board and in accordance with the ethical standards of the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The RCT study was pre-registered in the NIH registration website (TRIAL no. NCT01922830).
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Sherf-Dagan, S., Zelber-Sagi, S., Buch, A. et al. Prospective Longitudinal Trends in Body Composition and Clinical Outcomes 3 Years Following Sleeve Gastrectomy. OBES SURG 29, 3833–3841 (2019). https://doi.org/10.1007/s11695-019-04057-2
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DOI: https://doi.org/10.1007/s11695-019-04057-2