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Emerging Treatments and Technologies

XENical in the Prevention of Diabetes in Obese Subjects (XENDOS) Study

A randomized study of orlistat as an adjunct to lifestyle changes for the prevention of type 2 diabetes in obese patients

  1. Jarl S. Torgerson, MD, PHD1,
  2. Jonathan Hauptman, MD2,
  3. Mark N. Boldrin, MS2 and
  4. Lars Sjöström, MD, PHD1
  1. 1Department of Body Composition and Metabolism, Sahlgrenska University Hospital, Göteborg, Sweden
  2. 2Hoffmann-La Roche, Nutley, New Jersey
  1. Address correspondence and reprint requests to Professor Lars Sjöström, Department of Body Composition and Metabolism, Vita Stråket 15, Sahlgrenska University Hospital, S-413 45 Göteborg, Sweden. E-mail: lars.sjostrom{at}medfak.gu.se
Diabetes Care 2004 Jan; 27(1): 155-161. https://doi.org/10.2337/diacare.27.1.155
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  • Erratum - March 01, 2004

A randomized study of orlistat as an adjunct to lifestyle changes for the prevention of type 2 diabetes in obese patients

Abstract

OBJECTIVE—It is well established that the risk of developing type 2 diabetes is closely linked to the presence and duration of overweight and obesity. A reduction in the incidence of type 2 diabetes with lifestyle changes has previously been demonstrated. We hypothesized that adding a weight-reducing agent to lifestyle changes may lead to an even greater decrease in body weight, and thus the incidence of type 2 diabetes, in obese patients.

RESEARCH DESIGN AND METHODS—In a 4-year, double-blind, prospective study, we randomized 3,305 patients to lifestyle changes plus either orlistat 120 mg or placebo, three times daily. Participants had a BMI ≥30 kg/m2 and normal (79%) or impaired (21%) glucose tolerance (IGT). Primary endpoints were time to onset of type 2 diabetes and change in body weight. Analyses were by intention to treat.

RESULTS—Of orlistat-treated patients, 52% completed treatment compared with 34% of placebo recipients (P < 0.0001). After 4 years’ treatment, the cumulative incidence of diabetes was 9.0% with placebo and 6.2% with orlistat, corresponding to a risk reduction of 37.3% (P = 0.0032). Exploratory analyses indicated that the preventive effect was explained by the difference in subjects with IGT. Mean weight loss after 4 years was significantly greater with orlistat (5.8 vs. 3.0 kg with placebo; P < 0.001) and similar between orlistat recipients with impaired (5.7 kg) or normal glucose tolerance (NGT) (5.8 kg) at baseline. A second analysis in which the baseline weights of subjects who dropped out of the study was carried forward also demonstrated greater weight loss in the orlistat group (3.6 vs. 1.4 kg; P < 0.001).

CONCLUSIONS—Compared with lifestyle changes alone, orlistat plus lifestyle changes resulted in a greater reduction in the incidence of type 2 diabetes over 4 years and produced greater weight loss in a clinically representative obese population. Difference in diabetes incidence was detectable only in the IGT subgroup; weight loss was similar in subjects with IGT and or NGT.

  • BLCF, baseline observation carried forward
  • DPP, Diabetes Prevention Program
  • DPS, Diabetes Prevention Study
  • IGT, impaired glucose tolerance
  • ITT, intention to treat
  • LOCF, last observation carried forward
  • NGT, normal glucose tolerance
  • OGTT, oral glucose tolerance test
  • XENDOS, XENical in the prevention of Diabetes in Obese Subjects

Footnotes

  • L.S. had full access to study data and is responsible for the decision to submit.

    All authors participated in drafting the manuscript of this article.

    A table elsewhere in this issue shows conventional and Système International (SI) units and conversion factors for many substances.

    • Accepted October 10, 2003.
    • Received May 30, 2003.
  • DIABETES CARE
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XENical in the Prevention of Diabetes in Obese Subjects (XENDOS) Study
Jarl S. Torgerson, Jonathan Hauptman, Mark N. Boldrin, Lars Sjöström
Diabetes Care Jan 2004, 27 (1) 155-161; DOI: 10.2337/diacare.27.1.155

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XENical in the Prevention of Diabetes in Obese Subjects (XENDOS) Study
Jarl S. Torgerson, Jonathan Hauptman, Mark N. Boldrin, Lars Sjöström
Diabetes Care Jan 2004, 27 (1) 155-161; DOI: 10.2337/diacare.27.1.155
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