Table 3.

Variables and corresponding weighting factors for scores A_d, A_i, B_d, and B_i

		Weighting factorsa
Variables		Score Ad	Score Ai	Score Bd	Score Bi
Creatinine (mg/dL)	≥1.6	4.0	4	3.9	4
	<1.6	0	0	0	0
Ionized calcium (mg/dL)	<4.4	3.2	3	2.7	3
	≥4.4	0	0	0	0
Coagulation disorder	Yes	2.5	3	3.1	3
	No	0	0	0	0
SIRS	Yes	7.5	8	/	/
	No	0	0
Respiratory rate (mpm)	≥24	/	/	2.7	3
	<24			0	0

Abbreviation: SIRS, systemic inflammatory response syndrome.

^aWeighting factors was assigned based on calculated hazard ratio rounded after the decimal point for scores A_d and B_d (“d” for “decimal”) or rounded to the closest integer value for scores A_i and B_i (“i” for “integer”).