Incidence rate of venous thromboembolism (VTE) among Danish women during pregnancy and the puerperal period according to age, education, parity and other risk factors during the period 1995–2009.

aIncidence rate is number per 10,000 women-years at risk
bIn Denmark middle education is defined as 4 years of education after high school, and long education as 5 to 6 years of education after high school
cInformation necessary is not available for pregnancies that ended before week 22.