Retinopathy Predicts Cardiovascular Mortality in Type 2 Diabetic Men and Women

  1. Auni Juutilainen, MD1,
  2. Seppo Lehto, MD1,
  3. Tapani Rönnemaa, MD2,
  4. Kalevi Pyörälä, MD1 and
  5. Markku Laakso, MD1
  1. 1Department of Medicine, University of Kuopio, Kuopio, Finland
  2. 2Department of Medicine, University of Turku, Turku, Finland
  1. Address correspondence and reprint requests to Markku Laakso, MD, Academy Professor, Department of Medicine, University of Kuopio, 70210 Kuopio, Finland. E-mail: markku.laakso{at}kuh.fi

Abstract

OBJECTIVE—To investigate the association of retinopathy with the risk of all-cause, cardiovascular disease (CVD), and coronary heart disease (CHD) mortality in type 2 diabetic subjects in a population-based 18-year follow-up study with particular emphasis on sex differences.

RESEARCH DESIGN AND METHODS—Our study cohort comprised 425 Finnish type 2 diabetic men and 399 type 2 diabetic women who were free of CVD at baseline. The findings were classified based on standardized clinical ophthalmoscopy to categories of no retinopathy, background retinopathy, and proliferative retinopathy. The study end points were all-cause, CVD, and CHD mortality.

RESULTS—Adjusted Cox model hazard ratios (95% CIs) of all-cause, CVD, and CHD mortality in men were 1.34 (0.98–1.83), 1.30 (0.86–1.96), and 1.18 (0.74–1.89), respectively, for background retinopathy and 3.05 (1.70–5.45), 3.32 (1.61–6.78), and 2.54 (1.07–6.04), respectively, for proliferative retinopathy and in women 1.61 (1.17–2.22), 1.71 (1.17–2.51), and 1.79 (1.13–2.85), respectively, for background retinopathy and 2.92 (1.41–6.06), 3.17 (1.38–7.30), and 4.98 (2.06–12.06), respectively, for proliferative retinopathy.

CONCLUSIONS—Proliferative retinopathy in both sexes and background retinopathy in women predicted all-cause, CVD, and CHD death. These associations were independent of current smoking, hypertension, total cholesterol, HDL cholesterol, glycemic control of diabetes, duration of diabetes, and proteinuria. This suggests the presence of common background pathways for diabetic microvascular and macrovascular disease other than those included in the conventional risk assessment of CVD. The sex difference observed in the association of background retinopathy with macrovascular disease warrants closer examination.

Footnotes

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

    The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked “advertisement” in accordance with 18 U.S.C Section 1734 solely to indicate this fact.

    • Accepted October 22, 2006.
    • Received August 17, 2006.
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