Table 2.

Variables and their association to risk of mortality after treatment in Cox model.

	HR (95% CI)	P-value
Treatment duration (in general)	0.91 (0.89 to 0.92)	<0.001 (Linearity)
I tertile (<3.5 years)	1.00 (Reference)
II tertile (3.5 - 7.9 years)	0.69 (0.55 to 0.87)
III tertile (>7.9 years)	0.26 (0.20 to 0.34)
Age at discharge	1.06 (1.05 to 1.07)	<0.001
Male	1.44 (1.05 to 1.98)	0.024
SUD	1.42 (1.16 to 1.74)	0.001

The data are expressed as mean and standard deviation (SD), or count and percentage (%), as appropriate.