A retrospective study of weight-loss predictors following bariatric surgery in Malaysian patients with obesity

Fatin Hanani Mazri; Suzana Shahar; Nik Ritza Kosai; Mohd Azahadi Omar; Nilsiswati Ramilis; Reynu Rajan

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A retrospective study of weight-loss predictors following bariatric surgery in Malaysian patients with obesity

Author: Fatin Hanani Mazri ¹ ; Suzana Shahar ¹ ; Nik Ritza Kosai ² ; Mohd Azahadi Omar ³ ; Nilsiswati Ramilis ⁴ ; Reynu Rajan ²
Author Information

1. Dietetics Programme, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
2. Department of Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
3. Institute of Public Health, Ministry of Health, Kuala Lumpur, Malaysia
4. Department of Dietetics and Food Services, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia A
Publication Type:Journal Article
Keywords: Obesity; bariatric surgery; pre-operative weight; dietary adherence; rate of weight loss
From: Malaysian Journal of Nutrition 2019;25(3):423-433
CountryMalaysia
Language:English
Abstract: Introduction: A retrospective study was conducted with the aim of determining the factors that affect weight loss among post-bariatric surgery patients. Methods: A successful weight loss outcome in this study was defined as achieving at least 50% excess weight loss (EWL). Eligible participants were those who had undergone bariatric surgery at least two years prior to the study. Adherence to lifestyle recommendations post-bariatric surgery, binge eating, depression, and social support were assessed. Results: A total of 51 post-bariatric surgery patients were recruited with a mean post-operative period of 3.2±0.7 years. The mean preoperative weight of 116.6±28.8 kg and body mass index (BMI) 45.2±8.8 kg/m2 were significantly reduced to 86.6±21.0 kg and 33.6±6.7 kg/m2, respectively, during follow-up (p<0.001). A total of 66.7% of participants achieved successful weight loss following bariatric surgery, with a mean EWL of 73.6±21.9% and total weight loss (TWL) of 29.4±8.7%. According to multivariate regression analysis adjusted for age and gender, pre-operative weight (β=-1.580, p<0.05) and BMI (β=-1.398, p<0.05), rate of weight loss (β=1.045, p<0.01), and adherence to eating behaviour recommendations (β=0.177, p<0.05) were significant predictors of weight loss outcomes post-bariatric surgery. Conclusion: The lower pre-operative weight and BMI, the faster rate of weight loss and higher adherence towards eating behaviour advice were potential predictors of greater EWL and thus could increase the chance of successful weight loss maintenance post–bariatric surgery.
Full text:4.2019my0474.pdf