The success rate in weight loss is reported to be slightly higher in gastric bypass surgery than in sleeve gastrectomy; however, all techniques have shown good or excellent results. Many reports report a weight loss rate of 40-50% for sleeve gastrectomy and 65-70% for gastric bypass after 1 year.
Weight reduction generally continues for 18-24 months after surgery in all surgeries. It is common to gain some weight for about 2 to 5 years after surgery
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