Figure 3

Risk of thrombosis during follow-up: the 15-year risk of thrombosis was 48% in prefibrotic PMF, 16% in fibrotic PMF (grade 1, 2) and 17% in ET. Differences were significant between prefibrotic PMF vs fibrotic PMF (p = 0.049) and between prefibrotic PMF vs ET (p = 0.032).