The risk estimates were even higher for provoked venous thromboembolism (hazard ratio 3.11 95% confidence interval 1.23–7.86). Subjects with cystatin C levels in the top quartile (≥0.87 mg/L) had a 2.5-fold (hazard ratio 2.51 95% confidence interval 1.27–4.96) increased risk of venous thromboembolism compared to those with levels in the bottom quartile (≤0.72 mg/L) in adjusted analysis. A one standard deviation (0.11 mg/L) increase in serum cystatin C levels was associated with a 43% (hazard ratio 1.43 95% confidence interval 1.17–1.72) increased risk of total venous thromboembolism. ![]() Results There were 83 incident venous thromboembolic events, of which 53 (63.9 %) were provoked, during a median of 12.3 years of follow-up. Cox-regression models were used to calculate hazard ratios with 95% confidence intervals for venous thromboembolism. Incident venous thromboembolism was registered from the date of inclusion through to the end of follow-up, September 1, 2007. ![]() Normal kidney function was defined as a creatinine-based estimated glomerular filtration rate greater than 90 mL/min/1.73 m 2 and absence of microalbuminuria. Design and Methods Cystatin C was measured in serum from 3251 men and women with normal kidney function, aged 25–84 years, who participated in the Tromsø study in 1994–1995. ![]() The aim of this study was to investigate whether serum cystatin C was associated with a risk of venous thromboembolism among subjects with normal kidney function in a prospective population-based study. Abstract Background Previous studies have shown an association between impaired kidney function, assessed by cystatin C-based estimated glomerular filtration rate, and venous thromboembolism.
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