| |
Neurological reasons for referral
|
Respiratory reasons for referral
|
Abdominal and urological reasons for referral
|
Fever as reason for referral
|
Other reasons for referral
|
|---|
|
A
|
|
Ability to detect critically ill patients
|
|
Number of patients
|
|
True positive
|
1
|
1
|
0
|
0
|
3
|
|
True negative
|
60
|
125
|
143
|
58
|
131
|
|
False positive
|
3
|
19
|
3
|
7
|
5
|
|
False negative
|
1
|
3
|
2
|
3
|
12
|
|
Screening values
|
|
Sensitivity
|
50% (1-99)
|
25% (1-81)
|
0% (0-84)
|
0% (0-71)
|
20% (4-48)
|
|
Specificity
|
95% (87-99)
|
87% (80-92)
|
98% (94-100)
|
89% (79-96)
|
96% (92-99)
|
|
PPV
|
25% (1-81)
|
5% (0-25)
|
0% (0-71)
|
0% (0-41)
|
38% (9-76)
|
|
NPV
|
98% (91-100)
|
98% (93-100)
|
99% (95-100)
|
95% (86-99)
|
92% (86-96)
|
|
Accuracy
|
94% (88-100)
|
85% (79-91)
|
97% (94-100)
|
85% (77-94)
|
89% (84-94)
|
|
Likelihood ratios
|
|
of positive test
|
10.5 (1.8-61.8)
|
1.9 (0.3-10.9)
|
0.0
|
0.0
|
5.4 (1.4-20.5)
|
|
of negative test
|
0.5 (0.1-2.1)
|
0.9 (0.5-1.5)
|
1.0 (1.0-1.1)
|
1.1 (1.0-1.2)
|
0.8 (0.6-1.1)
|
|
B
|
|
Ability to detect patients who went home with no treatment
|
|
Number of patients
|
|
True positive
|
11
|
30
|
40
|
6
|
50
|
|
True negative
|
22
|
34
|
37
|
26
|
36
|
|
False positive
|
28
|
75
|
39
|
33
|
44
|
|
False negative
|
4
|
9
|
32
|
3
|
21
|
|
Screening values
|
|
Sensitivity
|
28% (15-45)
|
29% (20-38)
|
51% (39-62)
|
15% (6-31)
|
53% (43-64)
|
|
Specificity
|
85% (65-96)
|
79% (64-90)
|
54% (41-66)
|
90% (73-98)
|
63% (49-76)
|
|
PPV
|
73% (45-92)
|
77% (61-89)
|
56% (43-67)
|
67% (30-93)
|
70% (58-81)
|
|
NPV
|
44% (30-59)
|
31% (23-41)
|
49% (37-60)
|
44% (31-58)
|
45% (34-57)
|
|
Accuracy
|
51% (38-63)
|
43% (35-51)
|
52% (44-60)
|
47% (35-59)
| |
|
Likelihood ratios
|
|
of positive test
|
1.8 (0.7-5.1)
|
1.4 (0.7-2.6)
|
1.1 (0.8-1.5)
|
1.5 (0.45.5)
|
1.4 (10-2.1)
|
|
of negative test
|
0.9 (0.7-1.1)
|
0.9 (0.7-1.1)
|
0.9 (0.7-1.3)
|
0.9 (0.8-11)
|
0.7 (0.6-1.0)
|
- 95%-confidence intervals are indicated in brackets
