Claire L Reynolds1,2, Susan M Byrne3, Jeffrey M Hamdorf4. 1. School of Surgery, University of Western Australia (M507), 35 Stirling Highway, Crawley, WA, 6009, Australia. claire.reynolds@research.uwa.edu.au. 2. School of Psychology, University of Western Australia (M304), 35 Stirling Highway, Crawley, WA, 6009, Australia. claire.reynolds@research.uwa.edu.au. 3. School of Psychology, University of Western Australia (M304), 35 Stirling Highway, Crawley, WA, 6009, Australia. 4. School of Surgery, University of Western Australia (M507), 35 Stirling Highway, Crawley, WA, 6009, Australia.
Abstract
BACKGROUND: One of the most important outcomes following bariatric surgery is an improvement in health-related quality of life (QOL). This study aimed to explore what degree of weight loss is required after bariatric surgery in order to achieve a clinically significant change in QOL from pre-surgery to 4 to 5 years after surgery. METHODS: Participants were assessed prior to having surgery (N = 280) and were invited to participate in a follow-up study 4 to 5 years after surgery. Sixty-seven of the original participants agreed to take part and completed a Web-based survey, which included the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) questionnaire. Several analyses were conducted to examine the association between weight loss and clinically significant change in QOL. RESULTS: Mean age was 48.13 ± 10.37 years, 51 (76%) were female, 62 (92.5%) Caucasian, and mean baseline body mass index (BMI) was 41.11 ± 6.03 kg/m2. The mean percent of excess weight loss (EWL) was 46% (17% total weight loss), and 64% (n = 43) achieved a clinically significant change in QOL. The majority of those who lost ≥40% EWL had a clinically significant change in QOL, and their odds of achieving this change were 2.81 times higher than those that did not. CONCLUSIONS: Results indicated that an EWL of ≥40% may be sufficient for the majority of patients to achieve clinically significant change, but that ≥50% is a better predictor of clinically significant change.
BACKGROUND: One of the most important outcomes following bariatric surgery is an improvement in health-related quality of life (QOL). This study aimed to explore what degree of weight loss is required after bariatric surgery in order to achieve a clinically significant change in QOL from pre-surgery to 4 to 5 years after surgery. METHODS:Participants were assessed prior to having surgery (N = 280) and were invited to participate in a follow-up study 4 to 5 years after surgery. Sixty-seven of the original participants agreed to take part and completed a Web-based survey, which included the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) questionnaire. Several analyses were conducted to examine the association between weight loss and clinically significant change in QOL. RESULTS: Mean age was 48.13 ± 10.37 years, 51 (76%) were female, 62 (92.5%) Caucasian, and mean baseline body mass index (BMI) was 41.11 ± 6.03 kg/m2. The mean percent of excess weight loss (EWL) was 46% (17% total weight loss), and 64% (n = 43) achieved a clinically significant change in QOL. The majority of those who lost ≥40% EWL had a clinically significant change in QOL, and their odds of achieving this change were 2.81 times higher than those that did not. CONCLUSIONS: Results indicated that an EWL of ≥40% may be sufficient for the majority of patients to achieve clinically significant change, but that ≥50% is a better predictor of clinically significant change.
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