Table 3.

Thrombosis during follow-up according to age at MPN diagnosis

Age at MPN diagnosis (years)	Time after MPN diagnosis	HR of arterial thrombosis with 95% CI	HR of venous thrombosis with 95% CI
18–49	3 months	15.2 (9.1–25.5)	66.8 (42.5–105)
	1 year	6.0 (3.9–9.2)	14.6 (9.4–22.6)
	5 years	2.8 (1.9–4.1)	6.0 (4.1–8.8)
50–59	3 months	5.7 (3.8–8.6)	20.5 (13.1–32.0)
	1 year	3.0 2.3–4.0	9.0 (6.3–12.9)
	5 years	2.0 (1.5–2.5)	4.9 (3.6–6.7)
60–69	3 months	3.4 (2.6–4.4)	9.1 (6.4–13.0)
	1 year	2.0 (1.7–2.5)	5.4 (4.2–7.0)
	5 years	1.5 (1.2–1.7)	3.6 (2.9–4.5)
70–79	3 months	2.4 (2.0–2.8)	7.9 (6.0–10.5)
	1 year	1.7 (1.5–1.9)	4.3 (3.5–5.2)
	5 years	1.4 (1.2–1.5)	3.0 (2.5–3.5)
≥80	3 months	3.0 (2.5–3.5)	6.2 (4.5–8.6)
	1 year	2.1 (1.9–2.4)	3.1 (2.5–3.9)
	5 years	1.5 (1.3–1.7)	2.4 (1.9–3.2)

MPN=myeloproliferative neoplasm, HR=hazard ratio, CI=confidence interval