Document Detail

Pre-operative predictors of weight loss at 1-year after Lap-Band surgery.
MedLine Citation:
PMID:  11355027     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The authors studied a range of preoperative factors for their predictive value of effectiveness of Lap-Band placement, using the percentage of excess weight loss at 1-year as the outcome measure (%EWL1). METHODS: All factors were measured and recorded prior to surgery. Factors included: patient demographics, family, medical and weight history. Laboratory measures and the responses to the SF-36 Health Survey were also assessed. Factors were assessed for correlation with %EWL1. RESULTS: The group (N=440, F:M 383:57) had mean age 40.0+/-9.5 years, weight of 126+/-25 kg, and BMI 45.6+/-7.5 kg/m2 pre-operatively. At 1-year follow-up, the group had mean weight 97.6< or =20 kg, BMI 35.6 = 6.3 kg/m2, and %EWL1 45.8< or =17%. Increasing age (R= -0.13, p<0.01) and preoperative BMI (R=-0.22, p<0.001) were significantly associated with less %EWL1 and all other factors were controlled for these before assessing significance. Important factors associated with a lower %EWL1 included: hyperinsulinemia (R=-0.36, p<0.001), insulin resistance (R=-0.33, p<0.001) and disease associated with insulin resistance, poor physical ability, pain, and poor general health responses to the SF-36 Health Survey. Patients who consumed alcohol regularly had a better rate of weight loss (R= 0.23, p<0.005). Factors that had no influence included gender, a history of mental illness and measures of mental health, previous bariatric surgery, and a history of many medical conditions associated with obesity. CONCLUSION: Important physical factors have been found to influence the rate of weight loss. Those with increased age, pain, physical disability and insulin resistance have a great deal to gain from weight loss. Although this study has identified factors that are associated with less weight loss, we have not found any factor that predicts an unacceptably low weight loss and thus provides a contraindication to Lap-Band placement. The findings of this study allow us to set more realistic goals for the rate of weight loss in specified sub-groups of our patients.
J B Dixon; M E Dixon; P E O'Brien
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Obesity surgery     Volume:  11     ISSN:  0960-8923     ISO Abbreviation:  Obes Surg     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-05-16     Completed Date:  2001-09-13     Revised Date:  2007-12-05    
Medline Journal Info:
Nlm Unique ID:  9106714     Medline TA:  Obes Surg     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  200-7     Citation Subset:  IM    
Monash University Department of Surgery, Alfred Hospital, Melbourne, Victoria, Australia.
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MeSH Terms
Alcohol Drinking
Body Mass Index
Gastroplasty / methods*
Health Status Indicators
Insulin Resistance
Middle Aged
Obesity, Morbid / physiopathology,  surgery
Risk Factors
Treatment Outcome
Weight Loss

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