TABLE 6.

Predictive performance of m-APACHE-II score for in-hospital mortality for pooled cohort of patients with Gram-negative bacteremia^a

m-APACHE-II score at day 0	Crude mortality rate (%)	Result for a threshold value ≥index value				% correctly classified
		Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
1	0/1 (0.00)	100.0	0.0		100	16.6
2	0/2 (0.00)	100.0	0.5	16.7	100	17.0
3	0/6 (0.00)	100.0	1.5	16.8	100	17.9
4	0/5 (0.00)	100.0	4.6	17.3	100	20.4
5	1/6 (16.7)	100.0	7.1	17.6	100	22.6
6	1/4 (25.0)	97.4	9.7	17.7	95.0	24.3
7	1/4 (25.0)	94.9	11.2	17.5	91.7	25.1
8	1/7 (14.3)	92.3	12.8	17.4	89.3	26.0
9	0/7 (0.00)	89.7	15.8	17.5	88.6	28.1
10	2/21 (9.53)	89.7	19.4	18.1	90.5	31.1
11	1/15 (6.67)	84.6	29.1	19.2	90.5	38.3
12	1/21 (4.76)	82.1	36.2	20.4	91.0	43.8
13	4/20 (20.0)	79.5	46.4	22.8	91.9	51.9
14	0/12 (0.00)	69.2	54.6	23.3	89.9	57.0
15	4/20 (20.0)	69.2	60.7	26.0	90.8	62.1
16	4/15 (26.7)	59.0	68.9	27.4	89.4	67.2
17	5/20 (25.0)	48.7	74.5	27.5	88.0	70.2
18	2/13 (15.4)	35.9	82.1	28.6	86.6	74.5
19	2/7 (28.6)	30.8	87.8	33.3	86.4	78.3
20	2/5 (40.0)	25.6	90.3	34.5	85.9	79.6
21	2/7 (28.6)	20.5	91.8	33.3	85.3	80.0
22	2/5 (40.0)	15.4	94.4	35.3	84.9	81.3
23	1/2 (50.0)	10.3	95.9	33.3	84.3	81.7
24	1/4 (25.0)	7.7	96.4	30.0	84.0	81.7
25	2/3 (66.7)	5.1	98.0	33.3	83.8	82.6
27	0/1 (0.00)	0.0	98.5	0.00	83.2	82.1
28	0/1 (0.00)	0.0	99.0	0.00	83.3	82.6
29	0/1 (0.00)	0.0	99.5	0.00	83.3	83.0

^aCrude mortality rate is the ratio of the number of patients who died to the total number of patients. PPV, positive predictive value; NPV, negative predictive value.