Reporting Weight Loss 2007

Ain Shams University, Al Qāhirah, Muḩāfaz̧at al Qāhirah, Egypt
Obesity Surgery (Impact Factor: 3.75). 06/2007; 17(5):565-8. DOI: 10.1007/s11695-007-9116-0
Source: PubMed

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    • "Currently, there is no agreement on the best tool to describe WL after bariatric surgery. Commonly used metrics include percent excess WL (%EWL), percent excess body mass index loss (%EBL), number of BMI units lost, and percent total body WL (%TWL)[12,13]. Recently, %TWL has been suggested as the most accurate method because it is reported to be less influenced by confounding anthropometric factors, and WL results can be compared with behavioral and pharmacological series reported in the non-bariatric medical literature[14,15]. "
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    ABSTRACT: Background Currently, there is no agreement on the best method to describe weight loss (WL) after bariatric surgery. The aim of this study is to evaluate short-term outcomes using percent of total body weight loss (%TWL). Methods A single-institution retrospective study of 2420 patients undergoing Roux-en-Y gastric bypass (RYGB) was performed. Suboptimal WL was defined as %TWL < 20 % at 12 months. Results Mean preoperative BMI was 46.8 ± 7.8 kg/m2. One year after surgery, patients lost an average 14.1 kg/m2 units of body mass index (BMI), 30.0 ± 8.5 %TWL, and 68.5 ± 22.9 %EWL. At 6 and 12 months after RYGB, mean BMI and percent excess WL (%EWL) significantly improved for all baseline BMI groups (p < 0.01, BMI; p = 0.01, %EWL), whereas mean %TWL was not significantly different among baseline BMI groups (p = 0.9). The regression analysis between each metric outcome and preoperative BMI demonstrated that preoperative BMI did not significantly correlate with %TWL at 1 year (r = 0.04, p = 0.3). On the contrary, preoperative BMI was strongly but negatively associated with the %EWL (r = −0.52, p < 0.01) and positively associated with the BMI units lost at 1 year (r = 0.56, p < 0.01). In total, 11.3 % of subjects achieved <20 %TWL at 12 months and were considered as suboptimal WL patients. Conclusion The results of our study confirm that %TWL should be the metric of choice when reporting WL because it is less influenced by preoperative BMI. Eleven percent of patients failed to achieve successful WL during the in the first year after RYGB based on our definition.
    Full-text · Article · Jan 2016 · Obesity Surgery
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    • "The ideal body weight of each patient was estimated based on the formula that corresponds to the midpoint of the medium frame of the Metropolitan tables. The degree of weight loss was assessed with %EWL and percent of excess BMI loss (%EBL), which were calculated using the following formulas [2]: "
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    ABSTRACT: Purpose Bariatric surgery has become more prevalent owing to the worldwide obesity epidemic. With the growing number of bariatric procedures performed annually, the requirement for revisional and secondary operations is increasing accordingly. This study aimed to evaluate the initial experience of revisional bariatric surgery at a single specialized center. Methods A retrospective review of the prospectively established database identified all patients who underwent revisional bariatric surgery between January 2008 and August 2013. The causes, surgical outcomes, and efficacy of the revisional surgeries were analyzed. Results Twenty-two revisional surgeries were performed laparoscopically during the study period (13 laparoscopic adjustable gastric banding, 9 laparoscopic sleeve gastrectomy). The most common indication for revision was weight regain or insufficient weight loss (12/23, 52.2%), and Roux-en-Y gastric bypass (RYGB) was the most commonly performed secondary procedure (17/23, 73.9%, including four resectional RYGB procedures). Gastric pouch leak occurred in one patient following revisional RYGB, which required reoperation on the first postoperative day. The mean body mass index decreased from 35.9 to 28.8 kg/m2 at a mean follow-up period of 10 months after revision. The percent excess weight losses at 1, 3, 6, and 12 months postoperatively were 18.8%, 41.1%, 40.1%, and 47.4%, respectively. Conclusion Revisional bariatric surgery can be successfully performed via a laparoscopic approach with acceptable risk. Deliberate selection for the proper revisional procedure can efficiently manage undesirable results from the primary surgery.
    Full-text · Article · Jun 2014 · Annals of Surgical Treatment and Research
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    • "Furthermore, we extracted baseline BMI, baseline prevalence of DM, (mean) follow-up time, %EWL 1–2 years after surgery, and the prevalence of DM 1–2 years after surgery. %EWL was defined as described by Deitel et al. (14). The criteria used to classify DM were not the same in all included studies. "
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    ABSTRACT: It has been postulated that the effectiveness of bariatric surgery varies between ethnic groups. However, data regarding this topic are inconclusive, as most studies included few patients from minority groups. We conducted a meta-analysis to determine the difference in percentage of excess weight loss (%EWL) 1-2 years after bariatric surgery in people of African and Caucasian descent. We also studied differences in diabetes mellitus (DM) remission. We performed a MEDLINE and EMBASE search for studies reporting %EWL and/or DM remission after bariatric surgery and including both African Americans and Caucasians. The 613 publications obtained were reviewed. We included 14 studies (1,087 African Americans and 2,714 Caucasians); all provided data on %EWL and 3 on DM remission. We extracted surgery type, %EWL, and DM remission 1-2 years after surgery. After analyzing %EWL for any surgery type, we performed subanalyses for malabsorptive and restrictive surgery. The overall absolute mean %EWL difference between African Americans and Caucasians was -8.36% (95% CI -10.79 to -5.93) significantly in favor of Caucasians. Results were similar for malabsorptive (-8.39% [-11.38 to -5.40]) and restrictive (-8.46% [-12.95 to -3.97]) surgery. The remission of DM was somewhat more frequent in African American patients than in Caucasian patients (1.41 [0.56-3.52]). However, this was not statistically significant. In %EWL terms, bariatric surgery is more effective in Caucasians than in African Americans, regardless of procedure type. Further studies are needed to investigate the exact mechanisms behind these disparities and to determine whether ethnic differences exist in the remission of comorbidities after bariatric surgery.
    Full-text · Article · Sep 2012 · Diabetes care
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