Abstract
Purpose
This study aimed at assessing nutrient adequacy after 1 year in patients who had undergone gastric bypass (GB) surgery or sleeve gastrectomy (SG) and to investigate the association of nutrient adequacy with anthropometric indices.
Methods
A total of 180 severely obese patients (BMI ≥ 35 kg/m2) were selected among the participants of Tehran Obesity Treatment Study. Nutritional assessments were performed over 3 days of 24-h dietary recall. To evaluate the nutrient adequacy ratio (NAR), the subject’s nutrient intake was divided by the dietary reference intakes. The mean adequacy ratio (MAR) was also determined as the sum of NARs divided by the number of involved nutrients (n = 11).
Results
The mean age of SG (67%) and GB (32%) patients was 39.2 ± 12 and 41.4 ± 10 years, respectively. SG patients had more postoperative fat-free mass (52.0 ± 12 kg) than GB patients (49.7 ± 8 kg) (P < 0.05). The most common postoperative serum nutrient deficiencies were related to vitamin B12 (30%), ferritin (19%), and 25-hydroxyvitamin D (16.2%). Moreover, high inadequacy of protein (> 80%) and total fat (> 70%) intake was reported. The MAR score showed that almost 45% of the patients had possibly adequate intakes of some nutrients. The adequacy of nutrients was positively associated with fat-free mass (β = 8.67, P < 0.05).
Conclusion
These findings revealed that patients had inadequate nutrient intakes 1 year after bariatric surgery, which was accompanied by serum nutritional deficiencies. Compared to GB patients, SG patients had a better body composition. Overall, compliance of patients with dietary guidelines and supplementations needs to be carefully monitored in the postoperative period.
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Acknowledgments
The authors wish to acknowledge Ms. Niloofar Shiva and NedMedica for English proofreading of the manuscript.
Funding
This study was supported by the Research Institute for Endocrine Sciences of Shahid Beheshti University of Medical Sciences (grant No.: 1784). No other source of funding was used for this study.
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F.H.E. and M.B. designed the study, analyzed and interpreted the data, and drafted the manuscript. M.V., F.A., P.M., and A.K. contributed to manuscript review, critical appraisal, and specialist advice. M.B. and A.K. supervised the study. All authors reviewed and approved the final draft of the manuscript.
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Hosseini-Esfahani, F., Khalaj, A., Valizadeh, M. et al. Nutrient Intake and Deficiency of Patients 1 Year After Bariatric Surgery: Tehran Obesity Treatment Study (TOTS). J Gastrointest Surg 25, 911–918 (2021). https://doi.org/10.1007/s11605-020-04530-9
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DOI: https://doi.org/10.1007/s11605-020-04530-9