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Insulin resistance and bariatric surgery

The objective of this article is to systematically review the changes in insulin resistance after various types of bariatric surgical procedures. A Pubmed and EMBASE search for studies measuring insulin resistance before and after bariatric surgery was done and all original research articles from 1980 to present (2011) were included. Only the currently widely performed bariatric procedures were included. A metaâ€?analysis of change in HOMAâ€?IR was conducted, grouping studies with similar duration of followâ€?up. The percentage decrease in HOMAâ€?IR at <=2 weeks, 1 month, 3 months, 6 months, 12 months and >16–18 months was found to be (mean ± standard error) −33.48 ± 5.78, −46.43 ± 6.99, −38.79 ± 9.64, −58.62 ± 7.38, −44.91 ± 7.98 and −67.0…