Risk groups and survival in patients with essential thrombocythemia

Overall survival according to risk stratification in patients with essential thrombocythemia. Overall survival rates at 5, 10, and 20 years according to risk group with 95% confidence intervals (CIs) are as follows: low risk-100.0% (95% CI, 100.0-100.0), 94.6% (95% CI, 90.5-98.9), and 72.0% (95% CI, 62.4-82.8); intermediate risk-95.2% (95% CI, 91.1-99.4), 82.9% (95% CI, 75.8-90.7), and 29.0% (95% CI, 19.3-43.5); and high risk-87.7% (95% CI, 75.2-100.0), 52.6% (95% CI, 35.7-77.5), and 0%.