Table 3.
Univariate analysis outcomes to determine major risk factors of blood transfusion necessity by Binary Logistic Regression Analysis
| β | Std. Error | Test Statistics | p* | OR | 95% CI for OR | |||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Lower | Upper | |||||||
| First step | Age | .001 | .017 | 0.001 | .976 | 1.001 | .968 | 1.034 |
| Sex (male) | .858 | .629 | 1.865 | .172 | 2.359 | .688 | 8.088 | |
| RTS | .212 | .341 | .389 | .533 | 1.237 | .634 | 2.411 | |
| Shock index | 4.833 | 4.392 | 1.211 | .271 | 125.52 | .023 | 687370 | |
| Lactate level (mmol/l) | .355 | .199 | 3.199 | .074 | 1.427 | .967 | 2.106 | |
| Base deficit (mEq/L) | -.241 | .096 | 6.320 | .012 | .786 | .651 | .948 | |
| SBP (mmHg) | .035 | .034 | 1.061 | .303 | 1.035 | .969 | 1.106 | |
| DBP (mmHg) | -.050 | .041 | 1.433 | .231 | .952 | .877 | 1.032 | |
| Pulse Rate (p/min) | .013 | .044 | .082 | .775 | 1.013 | .928 | 1.105 | |
| Respiratory Rate (p/min) | .098 | .090 | 1.179 | .278 | 1.103 | .924 | 1.317 | |
| spO2 (%) | -.043 | .025 | 2.869 | .090 | .958 | .911 | 1.007 | |
| Hb (mg/dl) | -.188 | .201 | .874 | .350 | .829 | .559 | 1.228 | |
| Htc (%) | -.026 | .066 | .159 | .690 | .974 | .856 | 1.108 | |
| pH | 1.426 | 4.030 | .125 | .723 | 4.163 | .002 | 11217 | |
| Constant | -16.722 | 30.775 | .297 | .586 | .000 | |||
| Last step | Shock index | 7.283 | 1.550 | 22.070 | .000 | 1454.852 | 69.708 | 30363.665 |
| Lactate level (mmol/l) | .365 | .176 | 4.329 | .037 | 1.441 | 1.021 | 2.033 | |
| Base deficit (mEq/L) | -.255 | .073 | 12.071 | .001 | .775 | .672 | .895 | |
| SBP (mmHg) | .035 | .017 | 4.415 | .036 | 1.036 | 1.002 | 1.071 | |
| spO2 (%) | -.056 | .024 | 5.545 | .019 | 0.945 | .902 | .991 | |
| Constant | -9.015 | 3.905 | 5.330 | .021 | .000 | |||
OR: Odds ratio; CI: Confidence interval; RTS: Revised trauma score; SBP: Systolic blood pressure; DBP: Diastolic blood pressure; Hb: Hemoglobin; Htc: Hematocrit.