Table 2.

Cumulative incidence of VTE in patients with blood type O (n = 653) and non-O (n = 1055) divided in intermediate/low-risk and high-risk tumor types at 3-, 6-, 12-, and 24-month follow-up

	Cumulative VTE-incidence (%) [95% confidence interval]
	3 mo	6 mo	12 mo	24 mo
Overall
Blood type O	3.8 [2.5-5.5]	5.7 [4.1-7.7]	7.0 [5.1-9.1]	7.6 [5.7-9.9]
Blood type non-O	3.4 [2.4-4.7]	6.5 [5.1-8.1]	8.4 [6.8-10.2]	10.2 [8.4-12-2]
Intermediate/ low-risk cancer types
Blood type O	2.4 [1.3-4.0]	3.4 [2.0-5.2]	4.6 [3.0-6.7]	5.0 [3.3-7.1]
Blood type non-O	3.0 [2.0-4.3]	5.4 [4.0-7.1]	6.8 [5.2-8.6]	8.6 [6.8-10.6]
High-risk cancer types
Blood type O	9.2 [5.0-14.9]	14.7 [9.2-21.3]	16.2 [10.5-23.1]	17.9 [11.8-24.9]
Blood type non-O	5.2 [2.7-9.0]	11.1 [7.1-16.0]	15.5 [10.7-21.1]	17.3 [12.3-23.1]