Hepatic Outcomes after Jejunoileal Bypass: Is There a Publication Bias?

Authors: Meinhardt, Nelson; Souto, Kátia; Ulbrich-Kulczynski, Jane; Stein, Airton

Source: Obesity Surgery, Volume 16, Number 9, September 2006 , pp. 1171-1178(8)

Publisher: Springer

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Abstract:

Background: One of the reasons why jejunoileal bypass (JIB) was abandoned were reports of liver failure. The aim of this study was to describe histological findings in the intraoperative and follow-up liver biopsies of a cohort of super-obese patients who had undergone JIB. Methods: 50 consecutive patients underwent JIB. Samples of liver biopsies performed intraoperatively (41 patients) and in the follow-up (31 patients) were evaluated. Brunt's scale was used. Results: Mean age at operation was 37.9 ± 7.6 years, and 15 patients (30.6%) had diabetes type 2, 20 (40.8%) had dyslipidemia, 29 (59.2%) had high blood pressure, and one (0.5%) had hepatitis C. Mean BMI preoperatively was 52.8 ± 7.5 kg/m2. Mean follow-up time was 67.0 ± 42.8 months. At the time of the latest liver biopsy, the mean BMI was 35.7 ± 7.5 kg/m2. The % excess weight loss (%EWL) was 62.4 ± 20.0%. 8 deaths (16%) have occurred, none from liver-related complications. At liver biopsy during the JIB operation, NAFLD was confirmed in 36 patients (86.7%) and NASH in 13 (31.7%). In 25 patients with mean follow-up of 4.8 ± 4.0 years, there was no statistically significant change in the liver histology regarding the extent of steatosis (P=0.20), steatohepatitis (P=0.74) and fibrosis (P=0.71). Conclusions: There was a significant metabolic improvement, maintenance of the %EWL, and no worsening of liver histology. There has possibly been a publication bias concerning liver outcomes, where the type of JIB and the concomitance of hepatitis C were not taken into account.
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