Abstract
PURPOSE: To systematically and comprehensively evaluate the differences between laparoscopic Roux-en-Y gastric bypass (LRYGB) versus sleeve gastrectomy (LSG) in obese patients. METHODS: A systematic literature search was performed in PubMed, EMBASE, Web of Science, and the Cochrane Library from inception to December 2018. The meta-analysis was performed by the RevMan 5.3 software. RESULTS: Twenty-three articles with 7443 patients were included. In short term (< 3 years), LRYGB was superior to LSG in terms of improving comorbidities (T2D, odds ratio (OR) 1.93, 1.06-3.52, P < 0.05, hypertension, OR 1.59, 1.08-2.34, P < 0.05, dyslipidemia, OR 1.61, 1.05-2.46, P < 0.05), but there were no differences in the midterm and long term. Quality of life (QoL) after bariatric surgery was included, but no differences were observed in the QoL after LRYGB or LSG (gastrointestinal quality of life index (GIQLI) and Moorehead-Ardelt quality of life questionnaire (M-A-Q), P > 0.05). LRYGB achieved a higher EWL% than LSG (after 3 years, WMD 5.48, 0.13-10.84. P < 0.05; after 5 years, WMD 4.55, 1.04-8.05, P < 0.05) in long term, but no significant differences were found during 0.25- to 2.0-year follow-up. The rate of early and late complications was much higher in LRYGB than in LSG (early complications, OR = 2.11, 95% CI = 1.53-2.91, P < 0.001; late complications, OR = 2.60, 95% CI = 1.93-3.49, P < 0.001). CONCLUSIONS: This meta-analysis showed that LRYGB was more effective than LSG in comorbidities' resolution or improvement in short term. For weight loss, LRYGB had better long-term effects than LSG. In addition, no differences were observed in the quality of life after LRYGB or LSG. LRYGB was associated with more complications than LSG.