AIMS: To examine the association between changes in procoagulants (fibrinogen factors VII and VIII and von Willebrand factor) and the risk of insulin resistance. METHODS: Using data from the Coronary Artery Risk Development in Young Adults study, we followed 2398 black and white adults without diabetes, aged 25-37 years at year 7, to year 20. Levels of fibrinogen factors VII and VIII and von Willebrand factor were divided in tertiles (low/middle/high) at years 7 and 20 and four groups reflecting changes were defined: 'low' (low at years 7 and 20), 'stable' (low/middle at years 7 and 20, but not both low at years 7 and 20), 'high' (high at year 7 and low/middle at year 20; or low/middle at year 7 and high at year 20) and 'highest' (high at years 7 and 20). Linear regression models were used to evaluate 13-year changes (year 20-year 7) in fibrinogen level and factors VII, VIII and von Willebrand change groups in relation to insulin resistance measures. RESULTS: Homeostasis model assessment of insulin resistance (year 20) and changes in log homeostasis model assessment of insulin resistance (year 20-year 7) were significantly associated with the 13-year increase in fibrinogen (P < 0.001). Compared with participants in the low group, those in the high group had significantly higher levels of homeostasis model assessment of insulin resistance (year 20) and changes in homeostasis model assessment of insulin resistance (year 20-year 7) for fibrinogen factor VII and von Willebrand factor (P < 0.017). No significant associations were observed between fibrinogen VIII and insulin resistance measures. CONCLUSIONS: An increase in fibrinogen level and persistently high levels of factor VII and von Willebrand factor are significantly associated with increased risk of insulin resistance. These findings provide new insight into the mechanisms to explain the heightened risk for thrombosis in adults with insulin resistance/diabetes.
AIMS: To examine the association between changes in procoagulants (fibrinogenfactors VII and VIII and von Willebrand factor) and the risk of insulin resistance. METHODS: Using data from the Coronary Artery Risk Development in Young Adults study, we followed 2398 black and white adults without diabetes, aged 25-37 years at year 7, to year 20. Levels of fibrinogenfactors VII and VIII and von Willebrand factor were divided in tertiles (low/middle/high) at years 7 and 20 and four groups reflecting changes were defined: 'low' (low at years 7 and 20), 'stable' (low/middle at years 7 and 20, but not both low at years 7 and 20), 'high' (high at year 7 and low/middle at year 20; or low/middle at year 7 and high at year 20) and 'highest' (high at years 7 and 20). Linear regression models were used to evaluate 13-year changes (year 20-year 7) in fibrinogen level and factors VII, VIII and von Willebrand change groups in relation to insulin resistance measures. RESULTS: Homeostasis model assessment of insulin resistance (year 20) and changes in log homeostasis model assessment of insulin resistance (year 20-year 7) were significantly associated with the 13-year increase in fibrinogen (P < 0.001). Compared with participants in the low group, those in the high group had significantly higher levels of homeostasis model assessment of insulin resistance (year 20) and changes in homeostasis model assessment of insulin resistance (year 20-year 7) for fibrinogenfactor VII and von Willebrand factor (P < 0.017). No significant associations were observed between fibrinogenVIII and insulin resistance measures. CONCLUSIONS: An increase in fibrinogen level and persistently high levels of factor VII and von Willebrand factor are significantly associated with increased risk of insulin resistance. These findings provide new insight into the mechanisms to explain the heightened risk for thrombosis in adults with insulin resistance/diabetes.
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