Accuracy of Focused Assessment with Sonography for Trauma (FAST) in Blunt Abdominal Trauma
Table 2
Patients’ characteristics and outcomes.
True-positive (n = 135)
False-negative (n = 270)
Age (years)
45.2 ± 15.7
46.0 ± 17.3
0.654
Sex (male, %)
111(82.2%)
213 (78.9%)
0.598
Body mass index (kg/m2)
24.7 ± 4.3
24.8 ± 4.2
0.704
Prehospital time (min)
47.9 ± 21.3
61.9 ± 125.4
0.198
Vital signs
Initial SBP (mmHg)
117.8 ± 28.7
125.2 ± 27.5
0.008
Lowest SBP (mmHg)
82.2 ± 29.5
94.6 ± 28.9
<0.001
Initial heart rate (/min)
102.5 ± 25.4
97.2 ± 24.1
0.058
Initial respiratory rate (/min)
23.1 ± 6.7
23.4 ± 6.6
0.593
Glasgow Coma Scale
10.8 ± 5.2
11.8 ± 4.5
0.034
Injury severity score
31.3 ± 13.4
28.8 ± 11.8
0.040
Injury mechanism, n (%)
0.583
Motor vehicle crash
60 (44.4%)
79 (29.3%)
Auto versus pedestrian
22 (16.3%)
49 (18.1%)
Motorcycle
19 (14.1%)
56 (20.7%)
Bicycle
2 (1.5%)
1 (0.4%)
Fall
26 (19.3%)
70 (25.9%)
Assault
5 (3.7%)
11 (4.1%)
Machine
1 (0.7%)
2 (0.7%)
Other
0
2 (0.7%)
Transfusion within 24 h
Packed red blood cells (U)
12.4 ± 15.4
7.1 ± 10.6
<0.001
Fresh frozen plasma (U)
10.7 ± 14.2
6.3 ± 9.6
0.001
Treatment
Laparotomy, n (%)
88 (65.2%)
93 (34.4%)
<0.001
ICU LOS (days)
9.7 ± 14.0
9.8 ± 18.2
0.957
Hospital LOS (days)
27.6 ± 25.8
26.5 ± 30.5
0.720
Mortality, n (%)
Total
27 (20.0%)
40 (14.8%)
0.186
Initial SBP ≤ 90 mmHg
11 (34.4%) (n = 32)
13 (33.3%) (n = 39)
0.926
Lowest SBP ≤ 90 mmHg
24 (28.2%) (n = 85)
29 (25.2%) (n = 115)
0.633
SBP: systolic blood pressure; ICU: intensive care unit; LOS: length of stay. The lowest SBP was defined during initial resuscitation in the trauma bay. Mann–Whitney test was utilized.
