The cumulative incidence of TE. The cumulative incidence of TE by age groups with 95% CIs and patients at risk. The 2.5-year cumulative incidences were: 3.7% for 1.0 to 9.9 years (95% CI, 2.6%-4.8%); 15.5% for 10.0 to 17.9 years (95% CI, 11.3%-19.4%); 18.1% for 18.0 to 45.9 years (95% CI, 13.2-22.8).