Incidence and mortality of venous thrombosis: a population-based study
Article first published online: 15 MAR 2007
Journal of Thrombosis and Haemostasis
Volume 5, Issue 4, pages 692–699, April 2007
How to Cite
NÆSS, I. A., CHRISTIANSEN, S. C., ROMUNDSTAD, P., CANNEGIETER, S. C., ROSENDAAL, F. R. and HAMMERSTRØM, J. (2007), Incidence and mortality of venous thrombosis: a population-based study. Journal of Thrombosis and Haemostasis, 5: 692–699. doi: 10.1111/j.1538-7836.2007.02450.x
- Issue published online: 2 APR 2007
- Article first published online: 15 MAR 2007
- Received 19 October 2006, accepted 9 February 2007
- deep-vein thrombosis;
- general population;
- pulmonary embolism;
- venous thrombosis
Background: Estimates of the incidence of venous thrombosis (VT) vary, and data on mortality are limited.
Objectives: We estimated the incidence and mortality of a first VT event in a general population.
Methods: From the residents of Nord-Trøndelag county in Norway aged 20 years and older (n = 94 194), we identified all cases with an objectively verified diagnosis of VT that occurred between 1995 and 2001. Patients and diagnosis characteristics were retrieved from medical records.
Results: Seven hundred and forty patients were identified with a first diagnosis of VT during 516 405 person-years of follow-up. The incidence rate for all first VT events was 1.43 per 1000 person-years [95% confidence interval (CI): 1.33–1.54], that for deep-vein thrombosis (DVT) was 0.93 per 1000 person-years (95% CI: 0.85–1.02), and that for pulmonary embolism (PE) was 0.50 per 1000 person-years (95% CI: 0.44–0.56). The incidence rates increased exponentially with age, and were slightly higher in women than in men. The 30-day case-fatality rate was higher in patients with PE than in those with DVT [9.7% vs. 4.6%, risk ratio 2.1 (95% CI: 1.2–3.7)]; it was also higher in patients with cancer than in patients without cancer [19.1% vs. 3.6%, risk ratio 3.8 (95% CI 1.6–9.2)]. The risk of dying was highest in the first months subsequent to the VT, after which it gradually approached the mortality rate in the general population.
Conclusions: This study provides estimates of incidence and mortality of a first VT event in the general population.