• Changes in obesity-related diseases and biochemical variables after laparoscopic sleeve gastrectomy: A two-year follow-up study 

      Våge, Villy; Sande, Vetle Aaberge; Mellgren, Gunnar; Laukeland, Camilla; Behme, Jan Horst; Andersen, John Roger (Journal article; Peer reviewed, 2014)
      Background: To evaluate changes in obesity-related diseases and micronutrients after laparoscopic sleeve gastrectomy (LSG). Methods: We started the procedure in May 2007, and by December 2011, 117 patients could be ...
    • Inflammatory markers, the tryptophan-kynurenine pathway, and Vitamin B status after bariatric surgery 

      Christensen, Monika; Fadnes, Dag Jone Stokke; Røst, Therese Halvorsen; Pedersen, Eva Ringdal; Andersen, John Roger; Våge, Villy; Ulvik, Arve; Midttun, Øivind; Ueland, Per Magne; Nygård, Ottar; Mellgren, Gunnar (Journal article; Peer reviewed, 2018)
      Objective Obesity is associated with increased inflammation and insulin resistance. In conditions with chronic immune activation, low plasma vitamin B6-levels are described, as well as an increased kynurenine:tryptophan-ratio ...
    • Seven-year trajectories of body weight, quality of life and comorbidities following Roux-en-Y gastric bypass and sleeve gastrectomy 

      Nielsen, Hans Jørgen; Nedrebø, Bjørn Gunnar; Fosså, Alexander; Andersen, John Roger; Assmus, Jörg; Dagsland, Vigdis Halvorsen; Dankel, Simon N; Gudbrandsen, Oddrun Anita; Fernø, Johan; Hjellestad, Iren Drange; Hjermstad, Marianne Jensen; Kolotkin, Ronette Loganzo; Thorsen, Håvard Luong; Mellgren, Gunnar; Flølo, Tone Nygaard (Peer reviewed; Journal article, 2022)
      Background/objectives There is limited long-term data comparing the outcomes of sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) for severe obesity, both with respect to body weight, quality of life (QOL) and ...