Table 3. Hazard ratio for overall survival of patients with histiocytic and dendritic cell neoplasms in 3 risk groups.

Risk group	Hazard ratio	[95% confidence interval]	p-value
Low risk group	1
Intermediate risk group	12.0	1.741-82.722	<.0001
High risk group	21.0	3.101-142.202	<.0001