Prevalence, incidence rate, age-adjusted rate ratio with 95% confidence interval and confounder-adjusted rate ratios of venous thromboembolism (VTE) <b>during pregnancy</b> according to different risk factors.

a<p>Adjusted incidence per 10,000 women-years at risk.</p>b<p>Rate ratio adjusted for age, calendar-year, educational status, thrombophilia, anticoagulation treatment, medical diseases, assisted reproductive treatment, and parity.</p>c<p>Information necessary for the full analysis is not available for pregnancies that ended before week 22 (7% of the risk time).