Changes in body mass index following newly diagnosed type 2 diabetes and risk of cardiovascular mortality: A cohort study of 8486 primary-care patients

J. Bodegard, J. Sundstrom, B. Svennblad, C. J. Ostgren, Peter Nilsson, G. Johansson

Research output: Contribution to journalArticlepeer-review

Abstract

Aims. - Elevated body mass index (BMI) is associated with an increased risk of type 2 diabetes and cardiovascular disease (CVD). This study explored the association between BMI changes in the first 18 months of newly diagnosed type 2 diabetes and the risk of long-term CVD mortality. Methods. - A total of 8486 patients with newly diagnosed type 2 diabetes and no previous history of CVD or cancer were identified from 84 primary-care centres in Sweden. During the first year after diagnosis, patients were grouped according to BMI change: 'Increase', or >= +1 BMI unit; 'unchanged', or between +1 and-1 BMI unit; and 'decrease', or <=-1 BMI unit. Associations between BMI change and CVD mortality, defined as death from stroke, myocardial infarction or sudden death, were estimated using adjusted Cox proportional hazards models (NCT 01121315). Results. - Baseline mean age was 60.0 years and mean BMI was 30.2 kg/m(2). Patients were followed for up to 9 years (median: 4.6 years). During the first 18 months, 53.4% had no change in their BMI, while 32.2% decreased and 14.4% increased. Compared with patients with unchanged BMI, those with an increased BMI had higher risks of CVD mortality (hazard ratio: 1.63, 95% CI: 1.11-2.39) and all-cause mortality (1.33, 1.01-1.76). BMI decreases had no association with these risks compared with unchanged BMI: 1.06 (0.76-1.48) and 1.06 (0.85-1.33), respectively. Conclusion. - Increased BMI within the first 18 months of type 2 diabetes diagnosis was associated with an increased long-term risk of CVD mortality. However, BMI decrease did not lower the long-term risk of mortality. (C) 2013 Elsevier Masson SAS. All rights reserved.
Original languageEnglish
Pages (from-to)306-313
JournalDiabetes & Metabolism
Volume39
Issue number4
DOIs
Publication statusPublished - 2013

Subject classification (UKÄ)

  • Endocrinology and Diabetes

Free keywords

  • Epidemiology
  • Type 2 diabetes
  • Weight control
  • Cardiovascular disease
  • mortality

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