Table 3.

Risk scores in each potential risk group and categorization

Indicator variables			Calculated risk score	Risk groups by tertiles	No. of patients designated
sIPI	B symptoms	Pretransplant DS			PM	SMC
Low	Absence	1-3	0.000	Low	34	15
Low	Presence	1-3	0.658	Low	3	1
Low-intermediate	Absence	1-3	0.951	Low	19	7
Low	Absence	4	1.087	Low	21	7
High-intermediate or high	Absence	1-3	1.312	Low	15	7
Low-intermediate	Presence	1-3	1.609	Intermediate	5	5
Low	Presence	4	1.745	Intermediate	4	0
High-intermediate or high	Presence	1-3	1.970	Intermediate	10	1
Low-intermediate	Absence	4	2.039	Intermediate	17	2
High-intermediate or high	Absence	4	2.400	Intermediate	12	3
Low	Absence	5	2.611	High	4	2
Low-intermediate	Presence	4	2.696	High	3	2
High-intermediate or high	Presence	4	3.057	High	11	2
Low-intermediate	Absence	5	3.562	High	4	3
High-intermediate or high	Absence	5	3.923	High	4	1
High-intermediate or high	Presence	5	4.581	High	0	2

A linear predictor was calculated using the weighted sums of the indicator variables and their β coefficients and was categorized into tertiles.