title: The impact of selected factors on parameters of weight loss after sleeve gastrectomy.
abstract: BACKGROUND
  The effectiveness of sleeve gastrectomy has been confirmed in many studies. The impact of individual factors on the parameters of weight loss is still not clear.
  
  
  OBJECTIVE
  To identify important factors affecting the parameters of weight loss after sleeve gastrectomy.
  
  
  METHODS
  The impact of prognostic factors and postoperative care components on body mass index (BMI) and percentage excess weight loss (%EWL) was assessed in a group of 100 consecutive patients who underwent laparoscopic sleeve gastrectomy.
  
  
  RESULTS
  The baseline BMI and body mass in patients with BMI < 30 kg/m2and BMI ≥ 30 kg/m212 months after surgery were, respectively, 39.7 ±3.2 vs. 45.9 ±4.6 kg/m2, p < 0.0001, and 114.4 ±16.8 vs. 130.3 ±18.5 kg, p < 0.0001. In the group with EWL < 50%, the average age was 47.1 ±7.7 vs. 40.6 ±10.8 in the group with EWL ≥ 50%, p = 0.0025. In the group of patients with preoperative weight loss, %EWL was 61.4 ±17.2 vs. 53.3 ±19.3% in the group with no weight loss, p = 0.0496. Body mass index of the patients who started physical activities was 30.6 ±4.2 kg/m2vs. 34.0 ±5.6 kg/m2in the patients with no physical activity, p = 0.0013, and %EWL was 63.4 ±14.6 vs. 47.0 ±19.9%, p < 0.0001, respectively. In the case of patients regularly consulted by a dietician BMI was 30.6 ±4.2 kg/m2vs. 35.1 ±5.5 kg/m2in the group without systematic consultations, p < 0.0001, and %EWL was 63.1 ±15.1% vs. 42.3 ±18.2%, p < 0.0001.
  
  
  CONCLUSIONS
  Lower baseline body weight parameters, younger age, preoperative weight loss, starting systematic physical activities and constant care of a dietician were conducive to achieving better results of surgery, as assessed on the basis of changes in BMI and %EWL.
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Artur
authors.initials: A
authors.lastname: Binda
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Jaworski
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Emilia
authors.initials: E
authors.lastname: Kudlicka
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Adam
authors.initials: A
authors.lastname: Ciesielski
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Hubert
authors.initials: H
authors.lastname: Cabaj
authors.affiliation: Department of General, Oncological and Digestive Tract Surgery, Medical Centre of Postgraduate Education, Orlowski Hospital, Warsaw, Poland.
authors.forename: Wiesław
authors.initials: W
authors.lastname: Tarnowski
keywords: outcomes; postoperative care; prognostic factors; sleeve gastrectomy