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Obesity type and clustering of insulin resistance-associated cardiovascular risk factors in middle-aged men and women


OBJECTIVE: To examine different clusterings of the insulin resistance-associated cardiovascular risk factors with respect to different types of obesity.

DESIGN: A screening programme for obesity (body mass index; BMI≥30 kg/m2) and abdominal adiposity (waist-to-hip ratio; WHR≥1.00 in men and ≥0.88 in women).

SETTINGS: Pieksämäki District Health Centre and the Community Health Centre of the City of Tampere, Finland.

SUBJECTS: All volunteers were either aged 36, 41, 46 or 51 y (n=1148) and living in the town of Pieksämäki, with a control population of 162 subjects in the City of Tampere.

MAIN OUTCOME MEASURES: Different clusterings of: 1) hypertension (a systolic blood pressure≥160 mmHg and/or a diastolic blood pressure ≥95 mmHg or concurrent drug treatment for hypertension); 2) hyper-triglyceridaemia≥1.70 mmol/l; 3) a low level of high-density-lipoprotein (HDL) cholesterol; <1.00 mmol/l in men, <1.20 mmol/l in women; 4) abnormal glucose metabolism (impaired glucose tolerance or non-insulin-dependent diabetes) and 5) hyperinsulinaemia with a fasting plasma insulin≥13.0 mU/l.

RESULTS: The prevalence of a cluster consisting of dyslipidaemia (hypertriglyceridaemia and/or low HDL-cholesterol) and insulin resistance (abnormal glucose metabolism and/or hyperinsulinaemia) was found to be 4% in the control subjects, 18% in the abdominal adipose subjects (WHR≥1.00 in men and ≥0.88 in women with a BMI<30 kg/m2), 28% in the ‘pure’ obese subjects (BMI≥30 kg/m2 with WHR<1.00 in men and <0.88 in women), and 46% in the central obese subjects (subjects showing both ‘pure’ obesity and abdominal adiposity). The prevalence rates of the other clusterings of abnormalities varied similarly according to the type of obesity.

CONCLUSION: Clusterings of insulin resistance-associated abnormalities were related to the type of obesity in both middle-aged men and middle-aged women.

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Vanhala, M., Pitkäjärvi, T., Kumpusalo, E. et al. Obesity type and clustering of insulin resistance-associated cardiovascular risk factors in middle-aged men and women. Int J Obes 22, 369–374 (1998).

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  • obesity
  • abdominal adiposity
  • central obesity
  • epidemiology
  • metabolic syndrome
  • insulin resistance

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