Table 2.
Logistic Regression analysis evaluating the probability of VTE
| Estimate | Error | Z-Value | p value | |
|---|---|---|---|---|
| Intercept | −2.626 | 133.9 | −0.020 | 0.984 |
| Gender (female) | 0.06853 | 0.1764 | 0.388 | 0.697 |
| Age | 0.01099 | 0.006113 | 1.797 | 0.072 |
| Duration of surgery | 0.002883 | 0.0006824 | 4.225 | < 0.0002 |
| Type of surgery | 10.20 | 359.2 | 0.028 | 0.977 |
|
Patient positioning (prone position) compared to supine position |
0.4862 | 0.4250 | 0.144 | 0.252 |
|
Patient positioning(seated) compared to supine position |
0.04350 | 0.3868 | 0.112 | 0.910 |
|
Patient positioning (half side position) compared to supine position |
0.2694 | 0.3632 | 0.742 | 0.458 |
| No IPC use compared to IPC use | 1.097 | 0.3894 | 2.817 | 0.004 |
| D-Dimer determination | 2.550 | 0.3206 | 7.953 | < 0.0001 |
| Diagnosis WHO Grade 2 compared to WHO grade 1 | 3.683 | 3.419 | 1.077 | 0.281 |
| Diagnosis WHO Grade 3 compared to WHO grade 1 | −9.015 | 7.600 | −1.186 | 0.235 |
| Diagnosis WHO Grade 4 compared to WHO grade 1 | 5.175 | 2.460 | 2.104 | 0.035 |
| Diagnosis metastasis compared to WHO grade 1 | 8.535 | 2.585 | 3.302 | < 0.0001 |
| Diagnosis other compared to WHO grade 1 | 2.973 | 4.219 | 0.705 | 0.481 |