SAT-111 Reversal of Nonalcoholic Fatty Liver Disease with Bariatric Surgery in South Asians: Does the Type of Surgery Matter?

Nonalcoholic fatty liver disease (NAFLD) is a common complication of obesity with prevalence rates of 65 - 85% in obese individuals. It can be associated liver cell injury eventually leading to cirrhosis. Weight loss is the primary modality of treatment of NAFLD which can be difficult to achieve and maintain in a majority of patients. Bariatric surgery has been shown to reverse NAFLD but the type of bariatric surgery that is most effective, especially in South Asian patients is not clear. In this study we aimed to compare the effectiveness of laparoscopic sleeve gastrectomy (LSG) versus laparoscopic mini gastric bypass (LMGB) in reversing NAFLD in obese Sri Lankans. We did a retrospective analysis of medical records of 155 obese patients who underwent LSG and LMBG at Colombo South Teaching Hospital, Sri Lanka. Overall 114 (73.5%) and 41 (26.5%) patients underwent LSG and LMBG respectively. Among patients who underwent LSG and LMGB, there was no statistically significant difference in the baseline body weight (112.5 ± 19.5 vs 120.2 ± 29.4 kg), BMI (44.7 ± 6.1 vs 45.9 ± 8.0 kg/m(2)), waist circumference (WC) (female: 118.9 ± 11.2 cm vs 117.9 ± 9.0 cm, male: 125.5 ±14.7 cm vs 130.7 ±15.9 cm) and body fat percentage (BFP) (female: 45.9 ± 3.1% vs 43.1 ± 9.5%, male: 40.9 ± 6.8% vs 39.4 ± 1.6%). There was no significant difference between patients who underwent LSG and LMBG, in decrease in weight (24.7 ±7.1 kg vs 32.6 ±14.7 kg, p=0.12) and decrease in BMI (10.0 ±2.9 kg/m(2) vs 12.0 ±4.2 kg/m(2), p=0.08) at 6 months post-procedure as compared to baseline, although LMBG showed a trend towards greater benefit. There was no statistically significant difference in the decrease in WC (19.0 ±9.9 cm vs 20.8 ±5.8) and decrease in BFP (7.4% ±5.8 vs 10.8% ±5.6). Overall 88.4% of patients had NAFLD by ultrasound scan (USS) imaging criteria. Patients with LSG and LMBG did not show a significant difference in baseline AST (31.8 ±21.1 vs 26.8 ±11.6 U/L, p>0.05) and ALT (41.1 ±30.3 vs 35.8 ±25.7, p>0.05). At 6 months post procedure, AST (21.6 ±8.1 vs 25.0 ±13.9 U/L, p=0.32) and ALT (19.1 ±9.4 vs 26.9 ±11.0 U/L, p<0.05) levels were lower in patients with LSG than patients with LMBG, although only ALT values reached statistical significance. Thus LSG showed a greater degree of AST (32.1% vs 6.7%, p<0.05) and ALT (53.5% vs 24.9%, p=0.001) reduction compared to LMBG. At 6 months post-procedure, patients who underwent LSG had less patients with elevated AST (4.4% vs 11.1%) and ALT (4.4% vs 12.5%) as compared to LMBG. Overall LSG showed a higher rate of complete reversal of NAFLD (75.0% vs 44.4%) and improvement of the grade of NAFLD (91.7% vs 66.7%) on USS imaging when compared with LMBG. In conclusion, our study reveal that LSG has a more favorable effect on complete reversal and improvement of NAFLD when compared with LMBG. This effect seems to be independent of weight loss. Thus LSG should be considered ahead of LMBG when bariatric surgery is planned for obese patients with NAFLD.