TY - JOUR
T1 - Evaluation of the association between preoperative clinical factors and long-term weight loss after Roux-en-Y gastric bypass
AU - Wood, G. Craig
AU - Benotti, Peter N.
AU - Lee, Clare J.
AU - Mirshahi, Tooraj
AU - Still, Christopher D.
AU - Gerhard, Glenn S.
AU - Lent, Michelle R.
N1 - Funding Information:
This work was supported by funds from Geisinger Clinic, The Sigfried and Janet Weis Center for Research, and Geisinger Obesity Institute, aswell as by grant P30DK072488 from the Nutrition Obesity Research Center and grant KL2 5KL2TR001077-02 (Dr Lee) as part of an Institute for Clinical and Translational Research grant from the National Institutes of Health/National Center for Advancing Translational Sciences.
Publisher Copyright:
Copyright © 2016 American Medical Association. All rights reserved.
PY - 2016/11/1
Y1 - 2016/11/1
N2 - Importance: Weight loss after bariatric surgery varies, yet preoperative clinical factors associated with long-term suboptimal outcomes are not well understood. Objective: To evaluate the association between preoperative clinical factors and long-term weight loss after Roux-en-Y gastric bypass (RYGB). Design, Setting, and Participants: From June 2001 to September 2007, this retrospective cohort study followed up RYGB patients before surgery to 7 to 12 years after surgery. The setting was a large rural integrated health system. Of 1033 eligible RYGB patients who consented to participate in longitudinal research and completed surgery before October 2007, a total of 726 (70.3%) had a weight entered in the electronic medical record 7 or more years after surgery and were included in the analyses after exclusions for pregnancy and mortality. Date of the long-term weight measurement was recorded between August 2010 and January 2016. Main Outcomes and Measures: The primary outcomewas percentageweight loss (%WL) at 7 to 12 years after surgery. Preoperative clinical factors (>200) extracted from the electronic medical record included medications, comorbidities, laboratory test results, and demographics, among others. Results: Among the 726 study participants, 83.1%(n = 603) were female and 97.4% (n = 707) were of white race, with a mean (SD) preoperative body mass index (calculated as weight in kilograms divided by height in meters squared) of 47.5 (7.4). From the time of surgery to long-term follow-up (median, 9.3 postoperative years), the mean (SD) %WL was 22.5%(13.1%). Preoperative insulin use, history of smoking, and use of 12 or more medications before surgery were associated with greater long-term postoperative %WL (6.8%, 2.8%, and 3.1%, respectively). Preoperative hyperlipidemia, older age, and higher body mass index were associated with poorer long-term postoperative %WL (-2.8%, -8.8%, and -4.1%, respectively). Conclusions and Relevance: Fewpreoperative clinical factors associated with long-term weight loss after RYGB were identified. Preoperative insulin use was strongly associated with better long-term %WL, while preoperative hyperlipidemia, higher body mass index, and older age were associated with poorer %WL. Our findings provide additional insight into preoperative identification of RYGB patients at higher risk for long-term suboptimal outcomes.
AB - Importance: Weight loss after bariatric surgery varies, yet preoperative clinical factors associated with long-term suboptimal outcomes are not well understood. Objective: To evaluate the association between preoperative clinical factors and long-term weight loss after Roux-en-Y gastric bypass (RYGB). Design, Setting, and Participants: From June 2001 to September 2007, this retrospective cohort study followed up RYGB patients before surgery to 7 to 12 years after surgery. The setting was a large rural integrated health system. Of 1033 eligible RYGB patients who consented to participate in longitudinal research and completed surgery before October 2007, a total of 726 (70.3%) had a weight entered in the electronic medical record 7 or more years after surgery and were included in the analyses after exclusions for pregnancy and mortality. Date of the long-term weight measurement was recorded between August 2010 and January 2016. Main Outcomes and Measures: The primary outcomewas percentageweight loss (%WL) at 7 to 12 years after surgery. Preoperative clinical factors (>200) extracted from the electronic medical record included medications, comorbidities, laboratory test results, and demographics, among others. Results: Among the 726 study participants, 83.1%(n = 603) were female and 97.4% (n = 707) were of white race, with a mean (SD) preoperative body mass index (calculated as weight in kilograms divided by height in meters squared) of 47.5 (7.4). From the time of surgery to long-term follow-up (median, 9.3 postoperative years), the mean (SD) %WL was 22.5%(13.1%). Preoperative insulin use, history of smoking, and use of 12 or more medications before surgery were associated with greater long-term postoperative %WL (6.8%, 2.8%, and 3.1%, respectively). Preoperative hyperlipidemia, older age, and higher body mass index were associated with poorer long-term postoperative %WL (-2.8%, -8.8%, and -4.1%, respectively). Conclusions and Relevance: Fewpreoperative clinical factors associated with long-term weight loss after RYGB were identified. Preoperative insulin use was strongly associated with better long-term %WL, while preoperative hyperlipidemia, higher body mass index, and older age were associated with poorer %WL. Our findings provide additional insight into preoperative identification of RYGB patients at higher risk for long-term suboptimal outcomes.
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U2 - 10.1001/jamasurg.2016.2334
DO - 10.1001/jamasurg.2016.2334
M3 - Article
C2 - 27532274
AN - SCOPUS:84997132251
VL - 151
SP - 1056
EP - 1062
JO - JAMA Surgery
JF - JAMA Surgery
SN - 2168-6254
IS - 11
ER -