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Univariate analysis
|
Multivariable analysisa
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|---|
|
Variables
|
OR
|
95% CI
|
p-value
|
OR
|
95% CI
|
p-value
|
|---|
|
IPAL (ref. no arterial lesion)
|
5.81
|
1.73–19.49
|
0.004
|
4.53
|
1.23–16.66
|
0.023
|
|
Hemodynamic instability (ref. none)
|
28.50
|
8.85–91.74
|
< 0.001
|
–
|
–
|
–
|
|
Female gender (ref. male)
|
0.69
|
0.33–1.45
|
0.331
|
0.81
|
0.37–1.79
|
0.610
|
|
Age in categories (ref. 16–39 years)
| | |
0.696
| | |
0.763
|
|
40–49
|
0.53
|
0.18–1.55
|
0.247
|
0.53
|
0.17–1.68
|
0.284
|
|
50–69
|
0.93
|
0.39–2.23
|
0.868
|
0.89
|
0.35–2.26
|
0.811
|
|
≥ 70 years
|
1.00
|
0.31–3.21
|
0.999
|
0.87
|
0.24–3.07
|
0.825
|
|
ISS, continuous
|
1.17
|
1.11–1.24
|
< 0.001
|
–
|
–
|
–
|
|
ISS ≥25 (ref. < 25)
|
14.63
|
5.87–36.47
|
< 0.001
|
–
|
–
|
–
|
|
AO/OTA classification (ref. A)
| | |
0.077
|
–
|
–
|
–
|
|
B
|
1.13
|
0.43–2.92
|
0.808
| | | |
|
C
|
3.38
|
0.99–11.46
|
0.051
| | | |
|
Young and Burgess classification (ref. NC)
| | |
0.367
| | |
0.688
|
|
LC
|
1.04
|
0.39–2.76
|
0.937
|
0.94
|
0.34–2.58
|
0.907
|
|
APC
|
1.86
|
0.50–6.94
|
0.356
|
1.31
|
0.30–5.77
|
0.723
|
|
VS & CM
|
2.39
|
0.67–8.51
|
0.179
|
1.87
|
0.48–7.24
|
0.365
|
- a Hosmer-Lemeshow test, p = 0.589. The variance inflation factors (VIF) are all below 1.2, suggesting no collinearity
- After adjustment for sex and age, the presence of an IPAL was significantly associated with greater odds of PRBC transfusion independently of the types of PRI. Neither ISS nor hemodynamic instability was introduced in the regression model as both these factors were on the causal pathway from IPAL to transfusion
- OR: odds ratio; 95% CI: 95% confidence interval; IPAL: intra-pelvic arterial lesion; ISS: Injury Severity Score; NC: not classifiable; LC: lateral compression; APC: anteroposterior compression; VS: vertical shear; CM: combined mechanism
