Table 4.

Incidence rates of recurrent VTE per 100 patient years (gender and inherited thrombophilia) are depicted

Type of inherited thrombophilia	Exposure time (years)	Event (n)	Incidence per 100 PY % (95% CI)	p value
Gender: male	2014	87	4.3 (3.4–5.3)	< 0.0001
Gender: female	4690	91	1.9 (1.6–2.4)
Any IT	3578	111	3.1 (2.6–3.7)	0.089
No IT	2860	67	2.4 (1.9–3.0)
Combined IT	700	34	4.8 (3.4–6.8)	0.0006
Total	6704	178	2.6 (2.3–3.1)

CI confidence interval, PY patient years